{"product_id":"bioguard-back-up-2-algaecide-1-quart","title":"BioGuard Back Up 2 - 1 Quart","description":"\u003ch1 class=\"font-semibold leading-tight text-pretty first:mt-1 mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-lg lg:text-xl\" id=\"bioguard-back-up-2-algaecide---1-quart\"\u003eBioGuard Back Up 2 Algaecide - 1 Quart\u003c\/h1\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eBioGuard Back Up 2 is a proven weekly pool algaecide designed to help prevent algae before it starts. This 1 quart liquid algae preventative is formulated with a 50% quaternary ammonium compound and powerful wetting agents that help the product work into small cracks and crevices where algae can begin to form.\u003c\/p\u003e\n\u003ch2 class=\"font-semibold leading-tight text-pretty mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-lg first:mt-0 md:text-lg [hr+\u0026amp;]:mt-4\" id=\"reliable-weekly-algae-prevention\"\u003eReliable Weekly Algae Prevention\u003c\/h2\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eKeeping algae under control is easier when prevention is part of your regular pool care routine. BioGuard Back Up 2 helps protect clean, balanced pool water from algae growth while supporting clear, inviting water throughout the swimming season.\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eThis formula is especially useful during hot weather, heavy swimmer use, or after rain, when algae is more likely to develop. It is designed to complement the BioGuard 3-Step Care System and can be used as Step 3 in a weekly maintenance program.\u003c\/p\u003e\n\u003ch2 class=\"font-semibold leading-tight text-pretty mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-lg first:mt-0 md:text-lg [hr+\u0026amp;]:mt-4\" id=\"why-pool-owners-use-bioguard-back-up-2\"\u003eWhy Pool Owners Use BioGuard Back Up 2\u003c\/h2\u003e\n\u003ch2 class=\"font-semibold leading-tight text-pretty mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-base first:mt-0\" id=\"helps-prevent-algae-before-it-starts\"\u003eHelps Prevent Algae Before It Starts\u003c\/h2\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eBioGuard Back Up 2 is made for routine algae prevention. Weekly use helps protect pool water from algae growth before it becomes visible or difficult to manage.\u003c\/p\u003e\n\u003ch2 class=\"font-semibold leading-tight text-pretty mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-base first:mt-0\" id=\"powerful-wetting-agent\"\u003ePowerful Wetting Agent\u003c\/h2\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eThe formula includes a surfactant and wetting agent that helps the product reach into small cracks and crevices where algae commonly starts growing.\u003c\/p\u003e\n\u003ch2 class=\"font-semibold leading-tight text-pretty mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-base first:mt-0\" id=\"non-staining-formula\"\u003eNon-Staining Formula\u003c\/h2\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eBack Up 2 is designed to help control algae without staining pool surfaces when used as directed.\u003c\/p\u003e\n\u003ch2 class=\"font-semibold leading-tight text-pretty mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-base first:mt-0\" id=\"stable-in-sunlight-and-heat\"\u003eStable in Sunlight and Heat\u003c\/h2\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eThis product is formulated to remain effective in sunlight and higher water temperatures, two conditions where algae problems often become more active.\u003c\/p\u003e\n\u003ch2 class=\"font-semibold leading-tight text-pretty mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-base first:mt-0\" id=\"supports-vacation-pool-care\"\u003eSupports Vacation Pool Care\u003c\/h2\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eBioGuard Back Up 2 can also be used before a pool is left unattended to help protect against algae growth while you are away.\u003c\/p\u003e\n\u003ch2 class=\"font-semibold leading-tight text-pretty mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-lg first:mt-0 md:text-lg [hr+\u0026amp;]:mt-4\" id=\"product-details\"\u003eProduct Details\u003c\/h2\u003e\n\u003cdiv class=\"group relative my-[1em]\"\u003e\n\u003cdiv class=\"sticky top-0 z-20 h-0\"\u003e\n\u003cdiv class=\"absolute left-0 top-0 w-full overflow-hidden bg-raised border-x md:max-w-[90vw] border-subtlest ring-subtlest divide-subtlest\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"w-full overflow-auto scrollbar-subtle rounded-lg border md:max-w-[90vw] border-subtlest ring-subtlest divide-subtlest bg-raised\"\u003e\n\u003ctable class=\"[\u0026amp;_tr:last-child_td]:border-b-0 my-0 w-full table-auto border-separate border-spacing-0 text-sm font-sans rounded-lg [\u0026amp;_tr:last-child_td:first-child]:rounded-bl-lg [\u0026amp;_tr:last-child_td:last-child]:rounded-br-lg\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\" class=\"border-subtlest p-2 min-w-[48px] break-normal border-b text-left align-bottom border-r last:border-r-0 font-bold bg-subtle first:border-radius-tl-lg last:border-radius-tr-lg\"\u003eProduct Detail\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"border-subtlest p-2 min-w-[48px] break-normal border-b text-left align-bottom border-r last:border-r-0 font-bold bg-subtle first:border-radius-tl-lg last:border-radius-tr-lg\"\u003eInformation\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003eBrand\u003c\/td\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003eBioGuard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003eProduct\u003c\/td\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003eBack Up 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003eSize\u003c\/td\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003e1 Quart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003eForm\u003c\/td\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003eLiquid\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003eProduct Type\u003c\/td\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003eSwimming pool algaecide \/ algae preventative\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003eActive Ingredient Type\u003c\/td\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003e50% quaternary ammonium compound\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003ePrimary Use\u003c\/td\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003eWeekly algae prevention and algae control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003eBest For\u003c\/td\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003eRoutine pool maintenance and unattended pool protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003eCompatible Program\u003c\/td\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003eBioGuard 3-Step Care System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003eNot Recommended For\u003c\/td\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003ePools with attached spas or water features\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003eProduct Code\u003c\/td\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003e23050BIO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003eUPC\u003c\/td\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003e017541652469\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 class=\"font-semibold leading-tight text-pretty mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-lg first:mt-0 md:text-lg [hr+\u0026amp;]:mt-4\" id=\"compatibility-and-requirements\"\u003eCompatibility and Requirements\u003c\/h2\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eBioGuard Back Up 2 is designed for swimming pool algae prevention and works as part of the BioGuard Care System. It should not be used in pools with attached spas, fountains, waterfalls, or intricate water features.\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eBefore applying, make sure pool equipment is operating properly, clean or backwash the filter if needed, and balance the water. Apply directly to the pool with the pump and filter running.\u003c\/p\u003e\n\u003ch2 class=\"font-semibold leading-tight text-pretty mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-lg first:mt-0 md:text-lg [hr+\u0026amp;]:mt-4\" id=\"how-to-use-bioguard-back-up-2\"\u003eHow to Use BioGuard Back Up 2\u003c\/h2\u003e\n\u003ch2 class=\"font-semibold leading-tight text-pretty mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-base first:mt-0\" id=\"for-initial-application\"\u003eFor Initial Application\u003c\/h2\u003e\n\u003col class=\"marker:text-secondary list-decimal pl-8\"\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eMake sure pool water is balanced and the circulation system is running.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eAdd 6 fl oz per 10,000 gallons directly to the pool.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003ePour around the outside perimeter of the pool for even distribution.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eWait at least 15 minutes after application before swimming.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2 class=\"font-semibold leading-tight text-pretty mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-base first:mt-0\" id=\"for-weekly-maintenance\"\u003eFor Weekly Maintenance\u003c\/h2\u003e\n\u003col class=\"marker:text-secondary list-decimal pl-8\"\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eAdd 1.5 fl oz per 10,000 gallons every 5 to 7 days.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eApply with the pump and filter running.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eUse consistently as part of your weekly pool maintenance routine.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2 class=\"font-semibold leading-tight text-pretty mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-base first:mt-0\" id=\"after-heavy-rain-or-heavy-swimmer-use\"\u003eAfter Heavy Rain or Heavy Swimmer Use\u003c\/h2\u003e\n\u003col class=\"marker:text-secondary list-decimal pl-8\"\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eAdd an additional 1.5 fl oz per 10,000 gallons.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eCirculate pool water after application.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eContinue with normal weekly maintenance dosing.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2 class=\"font-semibold leading-tight text-pretty mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-base first:mt-0\" id=\"for-vacation-or-unattended-pool-care\"\u003eFor Vacation or Unattended Pool Care\u003c\/h2\u003e\n\u003col class=\"marker:text-secondary list-decimal pl-8\"\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eAdd 4 fl oz per 5,000 gallons for every week the pool will be unattended.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eApply around the pool perimeter while the circulation system is operating.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eIf shock is also being applied, follow all product label directions carefully.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2 class=\"font-semibold leading-tight text-pretty mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-lg first:mt-0 md:text-lg [hr+\u0026amp;]:mt-4\" id=\"dosage-guide\"\u003eDosage Guide\u003c\/h2\u003e\n\u003cdiv class=\"group relative my-[1em]\"\u003e\n\u003cdiv class=\"sticky top-0 z-20 h-0\"\u003e\n\u003cdiv class=\"absolute left-0 top-0 w-full overflow-hidden bg-raised border-x md:max-w-[90vw] border-subtlest ring-subtlest divide-subtlest\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"w-full overflow-auto scrollbar-subtle rounded-lg border md:max-w-[90vw] border-subtlest ring-subtlest divide-subtlest bg-raised\"\u003e\n\u003ctable class=\"[\u0026amp;_tr:last-child_td]:border-b-0 my-0 w-full table-auto border-separate border-spacing-0 text-sm font-sans rounded-lg [\u0026amp;_tr:last-child_td:first-child]:rounded-bl-lg [\u0026amp;_tr:last-child_td:last-child]:rounded-br-lg\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\" class=\"border-subtlest p-2 min-w-[48px] break-normal border-b text-left align-bottom border-r last:border-r-0 font-bold bg-subtle first:border-radius-tl-lg last:border-radius-tr-lg\"\u003eUse Case\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"border-subtlest p-2 min-w-[48px] break-normal border-b text-left align-bottom border-r last:border-r-0 font-bold bg-subtle first:border-radius-tl-lg last:border-radius-tr-lg\"\u003eDosage\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003eInitial application\u003c\/td\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003e6 fl oz per 10,000 gallons\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003eWeekly maintenance\u003c\/td\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003e1.5 fl oz per 10,000 gallons every 5 to 7 days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003eHeavy rain or heavy bather load booster\u003c\/td\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003eAdditional 1.5 fl oz per 10,000 gallons\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003eVacation treatment\u003c\/td\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003e4 fl oz per 5,000 gallons for each unattended week\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003eVisible algae treatment\u003c\/td\u003e\n\u003ctd class=\"border-subtlest p-2 min-w-[48px] break-normal border-b border-r last:border-r-0\"\u003e13.5 fl oz per 10,000 gallons after compatible oxidizer treatment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sticky z-10 h-0\"\u003e\n\u003cdiv class=\"bg-base border-subtlest shadow-subtle pointer-coarse:opacity-100 keyboard:opacity-100 right-1 absolute bottom-1 flex rounded-md border opacity-0 transition-opacity group-hover:opacity-100 [\u0026amp;\u0026gt;*:not(:first-child)]:border-subtlest [\u0026amp;\u0026gt;*:not(:first-child)]:border-l\"\u003e\n\u003cdiv class=\"flex transition-opacity duration-300 [\u0026amp;_button]:hover:bg-transparent\"\u003e\n\u003cdiv class=\"relative flex items-center justify-center\"\u003e\n\u003cdiv class=\"inline-flex\"\u003e\u003csvg role=\"img\" class=\"inline-flex fill-current shrink-0\" width=\"16\" height=\"16\" stroke-width=\"1.75\"\u003e\u003cuse\u003e\u003c\/use\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv class=\"absolute inset-0 flex items-center justify-center\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"flex transition-opacity duration-300 [\u0026amp;_button]:hover:bg-transparent\"\u003e\n\u003cdiv class=\"relative flex items-center justify-center\"\u003e\n\u003cdiv class=\"inline-flex\"\u003e\u003csvg role=\"img\" class=\"inline-flex fill-current shrink-0\" width=\"16\" height=\"16\" stroke-width=\"1.75\"\u003e\u003cuse\u003e\u003c\/use\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv class=\"absolute inset-0 flex items-center justify-center\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"flex [\u0026amp;_button]:hover:bg-transparent\"\u003e\n\u003cdiv class=\"relative flex items-center justify-center\"\u003e\n\u003cdiv class=\"inline-flex\"\u003e\u003csvg role=\"img\" class=\"inline-flex fill-current shrink-0\" width=\"16\" height=\"16\" stroke-width=\"1.75\"\u003e\u003cuse\u003e\u003c\/use\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv class=\"absolute inset-0 flex items-center justify-center\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 class=\"font-semibold leading-tight text-pretty mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-lg first:mt-0 md:text-lg [hr+\u0026amp;]:mt-4\" id=\"frequently-asked-questions\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch2 class=\"font-semibold leading-tight text-pretty mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-base first:mt-0\" id=\"what-is-bioguard-back-up-2-used-for\"\u003eWhat is BioGuard Back Up 2 used for?\u003c\/h2\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eBioGuard Back Up 2 is used to help prevent algae growth in swimming pools as part of a weekly maintenance routine.\u003c\/p\u003e\n\u003ch2 class=\"font-semibold leading-tight text-pretty mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-base first:mt-0\" id=\"is-bioguard-back-up-2-an-algaecide\"\u003eIs BioGuard Back Up 2 an algaecide?\u003c\/h2\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eYes. BioGuard Back Up 2 is a swimming pool algaecide and algae preventative.\u003c\/p\u003e\n\u003ch2 class=\"font-semibold leading-tight text-pretty mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-base first:mt-0\" id=\"can-i-use-bioguard-back-up-2-every-week\"\u003eCan I use BioGuard Back Up 2 every week?\u003c\/h2\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eYes. It is designed for weekly use, with a maintenance dose every 5 to 7 days after the initial application.\u003c\/p\u003e\n\u003ch2 class=\"font-semibold leading-tight text-pretty mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-base first:mt-0\" id=\"can-bioguard-back-up-2-be-used-in-pools-with-attac\"\u003eCan BioGuard Back Up 2 be used in pools with attached spas?\u003c\/h2\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eNo. BioGuard Back Up 2 is not recommended for pools with attached spas or water features.\u003c\/p\u003e\n\u003ch2 class=\"font-semibold leading-tight text-pretty mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-base first:mt-0\" id=\"does-bioguard-back-up-2-affect-pool-ph\"\u003eDoes BioGuard Back Up 2 affect pool pH?\u003c\/h2\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eBioGuard Back Up 2 is described as causing no pH level shifts when used as directed.\u003c\/p\u003e","brand":"BioGuard","offers":[{"title":"Default Title","offer_id":48288759611579,"sku":"23050BIO","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0269\/2625\/2077\/files\/BioGuardBackUp21quartliquidpoolalgaecideforweeklyalgaeprevention.jpg?v=1787514328","url":"https:\/\/hottubpirate.com\/products\/bioguard-back-up-2-algaecide-1-quart","provider":"Hot Tub Pirate","version":"1.0","type":"link"}