{"product_id":"applied-biochemists-black-algaetrine-black-algae-killer-32-oz","title":"Applied Biochemists Black Algaetrine Black Algae Killer - 32 oz","description":"\u003cdiv style=\"font-family:inherit;color:#1f2d33;line-height:1.6;max-width:100%;\"\u003e\n\u003cdiv style=\"background:#eef7f8;border-left:5px solid #0e7c86;border-radius:8px;padding:18px 20px;margin:0 0 1.4em;\"\u003e\n\u003ch2 style=\"color:#0b3954;font-size:1.3em;margin:0 0 0.6em;\"\u003eCopper and Penetrating Agents for Deep-Rooted Black Algae\u003c\/h2\u003e\n\u003cp style=\"margin:0 0 0.9em;\"\u003eApplied Biochemists® Black Algaetrine® is specially designed to fight tough black algae. It combines copper with penetrating agents that get past black algae's protective layer to kill and prevent even the most deeply rooted growth.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 0.9em;\"\u003ePair it with daily brushing for two days, and there is no waiting to swim after treatment.\u003c\/p\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:10px;margin-top:6px;\"\u003e\n\u003cdiv style=\"flex:1 1 110px;min-width:110px;background:#fff;border:1px solid #d5e6e8;border-radius:8px;padding:10px 12px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:0.78em;text-transform:uppercase;letter-spacing:0.04em;color:#0e7c86;font-weight:600;\"\u003eTargets\u003c\/div\u003e\n\u003cdiv style=\"font-size:1.15em;font-weight:700;color:#0b3954;\"\u003eBlack algae\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 110px;min-width:110px;background:#fff;border:1px solid #d5e6e8;border-radius:8px;padding:10px 12px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:0.78em;text-transform:uppercase;letter-spacing:0.04em;color:#0e7c86;font-weight:600;\"\u003eActives\u003c\/div\u003e\n\u003cdiv style=\"font-size:1.15em;font-weight:700;color:#0b3954;\"\u003eCopper + quat\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 110px;min-width:110px;background:#fff;border:1px solid #d5e6e8;border-radius:8px;padding:10px 12px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:0.78em;text-transform:uppercase;letter-spacing:0.04em;color:#0e7c86;font-weight:600;\"\u003eDose\u003c\/div\u003e\n\u003cdiv style=\"font-size:1.15em;font-weight:700;color:#0b3954;\"\u003e12 oz \/ 10k gal\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 110px;min-width:110px;background:#fff;border:1px solid #d5e6e8;border-radius:8px;padding:10px 12px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:0.78em;text-transform:uppercase;letter-spacing:0.04em;color:#0e7c86;font-weight:600;\"\u003eSize\u003c\/div\u003e\n\u003cdiv style=\"font-size:1.15em;font-weight:700;color:#0b3954;\"\u003e32 fl oz\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"color:#0b3954;font-size:1.35em;margin:1.6em 0 0.6em;padding-bottom:6px;border-bottom:2px solid #0e7c86;\"\u003eBuilt for Black Algae's Defenses\u003c\/h2\u003e\n\u003cp style=\"margin:0 0 0.9em;\"\u003eBlack algae roots into plaster and grout and hides under a waxy coating that shrugs off ordinary algaecides. Black Algaetrine pairs copper with a quaternary penetrating agent to reach the colony and kill it.\u003c\/p\u003e\n\u003ch2 style=\"color:#0b3954;font-size:1.35em;margin:1.6em 0 0.6em;padding-bottom:6px;border-bottom:2px solid #0e7c86;\"\u003eBrush, Treat, Vacuum\u003c\/h2\u003e\n\u003cp style=\"margin:0 0 0.9em;\"\u003eThe label routine is simple: brush the spots, apply 12 oz per 10,000 gallons around the pool edge, brush once a day for two days and vacuum away the debris. Brushing breaks the protective layer so the algaecide can work.\u003c\/p\u003e\n\u003ch2 style=\"color:#0b3954;font-size:1.35em;margin:1.6em 0 0.6em;padding-bottom:6px;border-bottom:2px solid #0e7c86;\"\u003eKeeps It From Coming Back\u003c\/h2\u003e\n\u003cp style=\"margin:0 0 0.9em;\"\u003eOnce the pool is clear, a 6 oz per 10,000 gallon maintenance dose every 5 to 7 days helps prevent black algae from returning, more often in hot weather or heavy use.\u003c\/p\u003e\n\u003ch2 style=\"color:#0b3954;font-size:1.35em;margin:1.6em 0 0.6em;padding-bottom:6px;border-bottom:2px solid #0e7c86;\"\u003eKey Features and Benefits\u003c\/h2\u003e\n\u003cul style=\"display:flex;flex-wrap:wrap;gap:12px;padding:0;margin:0 0 1em;\"\u003e\n\u003cli style=\"flex:1 1 230px;min-width:220px;list-style:none;background:#fff;border:1px solid #d5e6e8;border-top:3px solid #0e7c86;border-radius:8px;padding:12px 14px;margin:0;\"\u003e\n\u003cstrong style=\"color:#0b3954;display:block;margin-bottom:2px;\"\u003eBlack algae formula\u003c\/strong\u003eCopper plus penetrating agents.\u003c\/li\u003e\n\u003cli style=\"flex:1 1 230px;min-width:220px;list-style:none;background:#fff;border:1px solid #d5e6e8;border-top:3px solid #0e7c86;border-radius:8px;padding:12px 14px;margin:0;\"\u003e\n\u003cstrong style=\"color:#0b3954;display:block;margin-bottom:2px;\"\u003eKills deep-rooted growth\u003c\/strong\u003eGets past the protective layer.\u003c\/li\u003e\n\u003cli style=\"flex:1 1 230px;min-width:220px;list-style:none;background:#fff;border:1px solid #d5e6e8;border-top:3px solid #0e7c86;border-radius:8px;padding:12px 14px;margin:0;\"\u003e\n\u003cstrong style=\"color:#0b3954;display:block;margin-bottom:2px;\"\u003ePrevents recurrence\u003c\/strong\u003eMaintenance dose every 5–7 days.\u003c\/li\u003e\n\u003cli style=\"flex:1 1 230px;min-width:220px;list-style:none;background:#fff;border:1px solid #d5e6e8;border-top:3px solid #0e7c86;border-radius:8px;padding:12px 14px;margin:0;\"\u003e\n\u003cstrong style=\"color:#0b3954;display:block;margin-bottom:2px;\"\u003eNo waiting to swim\u003c\/strong\u003ePer Applied Biochemists.\u003c\/li\u003e\n\u003cli style=\"flex:1 1 230px;min-width:220px;list-style:none;background:#fff;border:1px solid #d5e6e8;border-top:3px solid #0e7c86;border-radius:8px;padding:12px 14px;margin:0;\"\u003e\n\u003cstrong style=\"color:#0b3954;display:block;margin-bottom:2px;\"\u003eSanitizer compatible\u003c\/strong\u003eBromine, chlorine and ozone.\u003c\/li\u003e\n\u003cli style=\"flex:1 1 230px;min-width:220px;list-style:none;background:#fff;border:1px solid #d5e6e8;border-top:3px solid #0e7c86;border-radius:8px;padding:12px 14px;margin:0;\"\u003e\n\u003cstrong style=\"color:#0b3954;display:block;margin-bottom:2px;\"\u003eClear dosing\u003c\/strong\u003e12 oz per 10,000 gallons.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"color:#0b3954;font-size:1.35em;margin:1.6em 0 0.6em;padding-bottom:6px;border-bottom:2px solid #0e7c86;\"\u003eProduct Details\u003c\/h2\u003e\n\u003cdiv style=\"overflow-x:auto;margin:0 0 1em;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;font-size:0.95em;\"\u003e\n\u003ccaption style=\"text-align:left;font-size:0.85em;color:#5b6b70;padding-bottom:6px;\"\u003eApplied Biochemists Black Algaetrine 32 oz specifications\u003c\/caption\u003e\n\u003cthead\u003e\u003ctr style=\"background:#0b3954;color:#fff;\"\u003e\n\u003cth scope=\"col\" style=\"text-align:left;padding:10px 12px;border:1px solid #0b3954;\"\u003eProduct Detail\u003c\/th\u003e\n\u003cth scope=\"col\" style=\"text-align:left;padding:10px 12px;border:1px solid #0b3954;\"\u003eInformation\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background:#eef7f8;\"\u003e\n\u003cth scope=\"row\" style=\"text-align:left;padding:9px 12px;border:1px solid #d5e6e8;color:#0b3954;width:42%;font-weight:600;\"\u003eBrand\u003c\/th\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #d5e6e8;\"\u003eApplied Biochemists®\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fff;\"\u003e\n\u003cth scope=\"row\" style=\"text-align:left;padding:9px 12px;border:1px solid #d5e6e8;color:#0b3954;width:42%;font-weight:600;\"\u003eProduct Name\u003c\/th\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #d5e6e8;\"\u003eBlack Algaetrine®\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#eef7f8;\"\u003e\n\u003cth scope=\"row\" style=\"text-align:left;padding:9px 12px;border:1px solid #d5e6e8;color:#0b3954;width:42%;font-weight:600;\"\u003eSize\u003c\/th\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #d5e6e8;\"\u003e32 fl oz (1 quart)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fff;\"\u003e\n\u003cth scope=\"row\" style=\"text-align:left;padding:9px 12px;border:1px solid #d5e6e8;color:#0b3954;width:42%;font-weight:600;\"\u003eManufacturer SKU\u003c\/th\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #d5e6e8;\"\u003e406303A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#eef7f8;\"\u003e\n\u003cth scope=\"row\" style=\"text-align:left;padding:9px 12px;border:1px solid #d5e6e8;color:#0b3954;width:42%;font-weight:600;\"\u003eUPC\u003c\/th\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #d5e6e8;\"\u003e785336163017\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fff;\"\u003e\n\u003cth scope=\"row\" style=\"text-align:left;padding:9px 12px;border:1px solid #d5e6e8;color:#0b3954;width:42%;font-weight:600;\"\u003eFor Use In\u003c\/th\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #d5e6e8;\"\u003eSwimming pools\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#eef7f8;\"\u003e\n\u003cth scope=\"row\" style=\"text-align:left;padding:9px 12px;border:1px solid #d5e6e8;color:#0b3954;width:42%;font-weight:600;\"\u003eProduct Type\u003c\/th\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #d5e6e8;\"\u003eCopper and quaternary black algae algaecide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fff;\"\u003e\n\u003cth scope=\"row\" style=\"text-align:left;padding:9px 12px;border:1px solid #d5e6e8;color:#0b3954;width:42%;font-weight:600;\"\u003eActive Ingredients\u003c\/th\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #d5e6e8;\"\u003eCopper ethanolamine complex 9.5% (3.07% metallic copper); alkyl dimethyl benzyl ammonium chloride 26.3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#eef7f8;\"\u003e\n\u003cth scope=\"row\" style=\"text-align:left;padding:9px 12px;border:1px solid #d5e6e8;color:#0b3954;width:42%;font-weight:600;\"\u003eEPA Reg. No.\u003c\/th\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #d5e6e8;\"\u003e8959-14\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fff;\"\u003e\n\u003cth scope=\"row\" style=\"text-align:left;padding:9px 12px;border:1px solid #d5e6e8;color:#0b3954;width:42%;font-weight:600;\"\u003eVisible Algae Dose\u003c\/th\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #d5e6e8;\"\u003e12 fl oz per 10,000 gallons\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#eef7f8;\"\u003e\n\u003cth scope=\"row\" style=\"text-align:left;padding:9px 12px;border:1px solid #d5e6e8;color:#0b3954;width:42%;font-weight:600;\"\u003eMaintenance Dose\u003c\/th\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #d5e6e8;\"\u003e6 fl oz per 10,000 gallons every 5–7 days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fff;\"\u003e\n\u003cth scope=\"row\" style=\"text-align:left;padding:9px 12px;border:1px solid #d5e6e8;color:#0b3954;width:42%;font-weight:600;\"\u003eWater pH\u003c\/th\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #d5e6e8;\"\u003eAdjust to 7.2–7.8 before use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#eef7f8;\"\u003e\n\u003cth scope=\"row\" style=\"text-align:left;padding:9px 12px;border:1px solid #d5e6e8;color:#0b3954;width:42%;font-weight:600;\"\u003eSignal Word\u003c\/th\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #d5e6e8;\"\u003eDanger (corrosive)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003ch2 style=\"color:#0b3954;font-size:1.35em;margin:1.6em 0 0.6em;padding-bottom:6px;border-bottom:2px solid #0e7c86;\"\u003eHow to Use\u003c\/h2\u003e\n\u003col style=\"list-style:none;padding:0;margin:0 0 1em;\"\u003e\n\u003cli style=\"display:flex;gap:12px;align-items:flex-start;margin:0 0 10px;\"\u003e\n\u003cspan aria-hidden=\"true\" style=\"flex:0 0 30px;height:30px;border-radius:50%;background:#0e7c86;color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;\"\u003e1\u003c\/span\u003e\u003cspan\u003e\u003cstrong style=\"color:#0b3954;\"\u003eBalance:\u003c\/strong\u003e Adjust pH to 7.2–7.8 with a test kit.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli style=\"display:flex;gap:12px;align-items:flex-start;margin:0 0 10px;\"\u003e\n\u003cspan aria-hidden=\"true\" style=\"flex:0 0 30px;height:30px;border-radius:50%;background:#0e7c86;color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;\"\u003e2\u003c\/span\u003e\u003cspan\u003e\u003cstrong style=\"color:#0b3954;\"\u003eBrush:\u003c\/strong\u003e Brush the black algae spots hard with a stiff algae brush.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli style=\"display:flex;gap:12px;align-items:flex-start;margin:0 0 10px;\"\u003e\n\u003cspan aria-hidden=\"true\" style=\"flex:0 0 30px;height:30px;border-radius:50%;background:#0e7c86;color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;\"\u003e3\u003c\/span\u003e\u003cspan\u003e\u003cstrong style=\"color:#0b3954;\"\u003eApply:\u003c\/strong\u003e Add 12 fl oz per 10,000 gallons around the edge of the pool. Don't concentrate it in one spot. For a very dirty pool, vacuum, clean and scrub the walls first.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli style=\"display:flex;gap:12px;align-items:flex-start;margin:0 0 10px;\"\u003e\n\u003cspan aria-hidden=\"true\" style=\"flex:0 0 30px;height:30px;border-radius:50%;background:#0e7c86;color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;\"\u003e4\u003c\/span\u003e\u003cspan\u003e\u003cstrong style=\"color:#0b3954;\"\u003eBrush again:\u003c\/strong\u003e Brush once a day for the next two days, then vacuum the settled debris.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli style=\"display:flex;gap:12px;align-items:flex-start;margin:0 0 10px;\"\u003e\n\u003cspan aria-hidden=\"true\" style=\"flex:0 0 30px;height:30px;border-radius:50%;background:#0e7c86;color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;\"\u003e5\u003c\/span\u003e\u003cspan\u003e\u003cstrong style=\"color:#0b3954;\"\u003eMaintain:\u003c\/strong\u003e Once clear, add 6 fl oz per 10,000 gallons every 5 to 7 days, more often in hot weather or heavy use.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2 style=\"color:#0b3954;font-size:1.35em;margin:1.6em 0 0.6em;padding-bottom:6px;border-bottom:2px solid #0e7c86;\"\u003eImportant Compatibility and Safety Notes\u003c\/h2\u003e\n\u003cdiv style=\"background:#fff8e6;border:1px solid #e0b44c;border-left:5px solid #e0b44c;border-radius:8px;padding:14px 16px;margin:0 0 1em;\"\u003e\n\u003ch3 style=\"color:#8a5a00;font-size:1.05em;margin:0 0 0.4em;\"\u003eCompatibility\u003c\/h3\u003e\n\u003cp style=\"margin:0;\"\u003eApplied Biochemists lists Black Algaetrine as compatible with bromine, chlorine and ozone. Add it by itself directly to the pool water; do not mix it with soap, other cleaners or other water-treatment chemicals. Avoid contact with strong acids and oxidizers. Biguanide compatibility is not stated.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#fdf1f0;border:1px solid #e4a29b;border-left:5px solid #e4a29b;border-radius:8px;padding:14px 16px;margin:0 0 1em;\"\u003e\n\u003ch3 style=\"color:#b42318;font-size:1.05em;margin:0 0 0.4em;\"\u003eSafety First\u003c\/h3\u003e\n\u003cp style=\"margin:0;\"\u003eDanger: corrosive. Causes irreversible eye damage and skin burns, is harmful if swallowed and may be fatal if absorbed through skin. Wear goggles or a face shield, rubber gloves and protective clothing. Toxic to fish and aquatic organisms. Store away from heat or open flame. Keep out of reach of children and pets, and always read and follow the full label directions and precautions on your container.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"color:#0b3954;font-size:1.35em;margin:1.6em 0 0.6em;padding-bottom:6px;border-bottom:2px solid #0e7c86;\"\u003eWhy Choose Applied Biochemists Black Algaetrine?\u003c\/h2\u003e\n\u003cp style=\"margin:0 0 0.9em;\"\u003eBlack algae needs a specialist treatment, and Black Algaetrine's copper-plus-penetrant formula is made for exactly that job.\u003c\/p\u003e\n\u003ch3 style=\"color:#0b3954;font-size:1.08em;margin:1.2em 0 0.3em;\"\u003eIdeal For\u003c\/h3\u003e\n\u003cul style=\"padding-left:0;margin:0 0 1em;list-style:none;\"\u003e\n\u003cli style=\"margin:0 0 6px;padding-left:26px;position:relative;\"\u003e\n\u003cspan aria-hidden=\"true\" style=\"position:absolute;left:0;color:#0e7c86;font-weight:700;\"\u003e✓\u003c\/span\u003ePlaster and gunite pools with black spots\u003c\/li\u003e\n\u003cli style=\"margin:0 0 6px;padding-left:26px;position:relative;\"\u003e\n\u003cspan aria-hidden=\"true\" style=\"position:absolute;left:0;color:#0e7c86;font-weight:700;\"\u003e✓\u003c\/span\u003eRecurring black algae\u003c\/li\u003e\n\u003cli style=\"margin:0 0 6px;padding-left:26px;position:relative;\"\u003e\n\u003cspan aria-hidden=\"true\" style=\"position:absolute;left:0;color:#0e7c86;font-weight:700;\"\u003e✓\u003c\/span\u003ePool pros treating problem pools\u003c\/li\u003e\n\u003cli style=\"margin:0 0 6px;padding-left:26px;position:relative;\"\u003e\n\u003cspan aria-hidden=\"true\" style=\"position:absolute;left:0;color:#0e7c86;font-weight:700;\"\u003e✓\u003c\/span\u003eChlorine, bromine and ozone pools\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"color:#0b3954;font-size:1.35em;margin:1.6em 0 0.6em;padding-bottom:6px;border-bottom:2px solid #0e7c86;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv style=\"border:1px solid #d5e6e8;border-radius:8px;padding:12px 16px;margin:0 0 10px;background:#fff;\"\u003e\n\u003ch3 style=\"color:#0b3954;font-size:1.03em;margin:0 0 0.35em;\"\u003eHow do I kill black algae in my pool?\u003c\/h3\u003e\n\u003cp style=\"margin:0;\"\u003eBrush the spots, apply Black Algaetrine at 12 oz per 10,000 gallons around the pool edge, brush once a day for two days and vacuum the debris. Keep pH at 7.2–7.8.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #d5e6e8;border-radius:8px;padding:12px 16px;margin:0 0 10px;background:#fff;\"\u003e\n\u003ch3 style=\"color:#0b3954;font-size:1.03em;margin:0 0 0.35em;\"\u003eWhy is black algae so hard to kill?\u003c\/h3\u003e\n\u003cp style=\"margin:0;\"\u003eIt roots into the surface and has a protective coating. Black Algaetrine uses penetrating agents, and daily brushing breaks the coating so the algaecide can reach it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #d5e6e8;border-radius:8px;padding:12px 16px;margin:0 0 10px;background:#fff;\"\u003e\n\u003ch3 style=\"color:#0b3954;font-size:1.03em;margin:0 0 0.35em;\"\u003eCan I swim after using Black Algaetrine?\u003c\/h3\u003e\n\u003cp style=\"margin:0;\"\u003eApplied Biochemists says there is no waiting to swim after treatment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #d5e6e8;border-radius:8px;padding:12px 16px;margin:0 0 10px;background:#fff;\"\u003e\n\u003ch3 style=\"color:#0b3954;font-size:1.03em;margin:0 0 0.35em;\"\u003eHow do I keep black algae from coming back?\u003c\/h3\u003e\n\u003cp style=\"margin:0;\"\u003eAfter the pool clears, add 6 oz per 10,000 gallons every 5 to 7 days, more often in hot weather or heavy use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #d5e6e8;border-radius:8px;padding:12px 16px;margin:0 0 10px;background:#fff;\"\u003e\n\u003ch3 style=\"color:#0b3954;font-size:1.03em;margin:0 0 0.35em;\"\u003eIs Black Algaetrine safe for salt water pools?\u003c\/h3\u003e\n\u003cp style=\"margin:0;\"\u003eApplied Biochemists' product page lists bromine, chlorine and ozone. The EPA label allows a salt water compatibility claim, so check your container label.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #d5e6e8;border-radius:8px;padding:12px 16px;margin:0 0 10px;background:#fff;\"\u003e\n\u003ch3 style=\"color:#0b3954;font-size:1.03em;margin:0 0 0.35em;\"\u003eShould I dilute Black Algaetrine?\u003c\/h3\u003e\n\u003cp style=\"margin:0;\"\u003eRetailer directions call for diluting it in a bucket with at least nine parts water. Follow the method on your container label.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Applied Biochemists","offers":[{"title":"Default Title","offer_id":67774456529083,"sku":"406303A","price":45.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0269\/2625\/2077\/files\/black_rgb.jpg?v=1792547326","url":"https:\/\/hottubpirate.com\/products\/applied-biochemists-black-algaetrine-black-algae-killer-32-oz","provider":"Hot Tub Pirate","version":"1.0","type":"link"}