Description
One Mineral Cycle With Four Bromine Refills: A 4-Month FROG Serene Bundle
This FROG Serene bundle pairs one blue mineral cartridge with four yellow 150 g bromine cartridges. It is the 4-month bundle: the mineral runs a full 4 months, and four bromine cartridges at FROG's typical three weeks each carry you most or all of the way there.
It refills either the FROG Serene Floating System or a hot tub with a built-in FROG Serene In-Line holder. The bundle ships free to US addresses on online orders at HotTubPirate.com.
Built Around the 4-Month Mineral Cycle
FROG rates the mineral at 4 months and each bromine cartridge at 2 to 4 weeks, usually about three. Four bromine cartridges line up with that schedule better than three, so fewer mid-cycle orders.
Fits Both FROG Serene Systems
All FROG Serene bromine cartridges work in both the floater and the in-line holder, and so does the blue mineral. Floating and built-in Serene owners can use the same bundle.
One Order Instead of Five
Five genuine FROG cartridges arrive together with free US shipping on online orders, so you are not placing a separate order every few weeks.
Key Features and Benefits
- 1 Blue Mineral Cartridge4 months, set to #6.
- 4 Yellow Bromine Cartridges150 g each, dial 0–6.
- About a 4-Month SupplyAt FROG's typical three weeks per bromine.
- Floating or In-LineFits both FROG Serene systems.
- PrefilledNo scooping or measuring bromine.
- UPC 722906005599Matches the 4-month bundle sold elsewhere.
- Free US ShippingOn online orders at HotTubPirate.com.
Product Details
| Product Detail | Information |
|---|---|
| Brand | FROG (King Technology, Inc.) |
| Product | FROG Serene Mineral Cartridge plus 4 Bromine Cartridges (4-month bundle) |
| Bundle Contents | 1 FROG Serene Mineral Cartridge (blue) and 4 FROG Serene Bromine Cartridges, 150 g (yellow) |
| Product Type | Replacement cartridge bundle for FROG Serene Floating and In-Line systems |
| Made For | FROG Serene Floating System and FROG Serene In-Line System |
| Hot Tub Size | Up to 600 gallons |
| Bromine Cartridges | Yellow, 150 g (5.3 oz) each, EPA Reg. No. 53735-16, order code 01-14-3824 |
| Floating Holder Included | No |
| Test Strips or Jump Start Included | No |
| Estimated Supply | One 4-month mineral cycle plus four bromine cartridges (about 8 to 16 weeks of bromine, typically about 12) |
| Mineral Cartridge | Blue, 2.05 oz (58 g), silver chloride 0.5%, EPA Reg. No. 53735-11 |
| Mineral Setting and Life | #6, replace every 4 months or at each drain and refill |
| Bromine Active Ingredient | BCDMH (1-bromo-3-chloro-5,5-dimethylhydantoin) |
| Bromine Setting | 0 to 6, matched to hot tub gallons (200–600) |
| Bromine Cartridge Life | About 2 to 4 weeks each, replace when empty |
| Target Bromine Level | 1.0–2.0 ppm, at least 1.0 ppm at all times |
| Refillable | No |
| Recommended Shock | FROG Maintain non-chlorine shock, weekly or as needed |
| Hazard Classification (SDS) | Bromine: Danger, corrosive and oxidizer. Mineral: Caution, very toxic to aquatic life |
| Manufacturer Part Number | Not specified in reviewed product details (components 01-14-3812 and 01-14-3824) |
| Store SKU | Frog Serene 1 Mineral 4 Bromine |
| UPC | 722906005599 |
| Image Alt Text | FROG Serene four yellow bromine cartridges and one blue mineral cartridge in a row |
How to Use the Mineral + 4 Bromine Bundle
- Start a cycle with two cartridges: At a fresh fill or your 4-month mineral change, turn the blue mineral to #6 and one yellow bromine to your chart number.
- Place them in your Serene holder: In the floater, push both into the openings until they hold. In a built-in In-Line holder, the mineral goes in the top area and the bromine in the lower area, with the jets off.
- Keep three bromine cartridges in reserve: Leave the rest sealed in the box. You will reach for them over the next few months.
- Watch for an empty bromine cartridge: Test regularly with FROG Test Strips. When bromine drops and the cartridge is spent, drain the water out of it and install the next yellow cartridge at the same setting.
- Close the cycle at 4 months: Replace the blue mineral after 4 months or at your next drain and refill, even if media still rattles inside, then start a new bundle.
FROG Serene Bromine Cartridge Setting Chart
| Hot Tub Size | Bromine Cartridge Setting |
|---|---|
| 200 gallons | 0 |
| 250 gallons | 1 |
| 300 gallons | 1 |
| 350 gallons | 2 |
| 400 gallons | 3 |
| 450 gallons | 4 |
| 500 gallons | 5 |
| 550 gallons | 5 |
| 600 gallons | 6 |
From the FROG Serene Floating and In-Line manuals. The blue mineral cartridge always goes on #6. For the first week, test daily and move the bromine cartridge up or down one setting per day until the strip reads 1.0 to 2.0 ppm bromine.
Compatibility Notes
Before You Buy
- Fits the FROG Serene Floating System and hot tubs with a built-in FROG Serene In-Line holder, such as select Marquis, Caldera and Hot Spring models.
- The four bromine cartridges are the yellow 150 g size. Every FROG Serene bromine cartridge fits both systems; the larger green 200 g is made mainly for in-line hot tubs.
- Covers hot tubs up to 600 gallons, using the setting chart below.
- Cartridges only. No floater, test strips or Jump Start in this bundle.
- Not compatible with FROG @ease holders or SmartChlor cartridges.
FROG Serene Starter vs Refill Options
| Option | Best For | Replace |
|---|---|---|
| FROG Serene Floating System (green floater + 1 blue + 1 yellow + Jump Start + test strips) | Starting from scratch with no FROG holder | Holder lasts; cartridges as below |
| FROG Serene Cartridge Kit (1 blue + 3 yellow) | Floating or In-Line refill | One mineral cycle, three bromine changes |
| FROG Serene Mineral + 4 Bromine bundle (1 blue + 4 yellow) (this listing) | Floating or In-Line refill | One mineral cycle, four bromine changes |
| FROG Serene Mineral Cartridge (blue) | Floating and In-Line | Every 4 months or at drain and refill |
| FROG Serene Bromine Cartridge, 150 g (yellow) | Floating and In-Line | When empty, about 2 to 4 weeks |
| FROG Serene In-Line Bromine Cartridge, 200 g (green) | Mainly In-Line (also fits Floating) | When empty, about 2 to 4 weeks |
Blue is always the mineral. Every FROG Serene bromine cartridge, yellow 150 g or green 200 g, fits both the floater and the in-line holder; the green 200 g is made mainly for in-line hot tubs. FROG @ease cartridges are a separate SmartChlor system.
Why Choose the Mineral + 4 Bromine Bundle
It matches how FROG Serene is actually used: one mineral cartridge for 4 months and a bromine swap about every three weeks, packed into one order. Explore the full FROG Serene line, or compare every hot tub bromine option at HotTubPirate.com.
Ideal For
- FROG Serene Floating System owners
- Built-in FROG Serene In-Line hot tubs
- Busier hot tubs that use more bromine
- Hot tubs up to 600 gallons
- Shoppers who want free shipping
Frequently Asked Questions
How many cartridges are in this bundle?
Five. You get a single blue mineral for the full 4 months plus four yellow 150 g bromine refills to rotate through, all prefilled and ready to dial in.
Why is this called a 4-month bundle?
The mineral lasts 4 months, and FROG says a bromine cartridge usually lasts about three weeks. Four of them cover roughly 12 weeks, or up to 16 in a lightly used tub.
Does it fit my built-in FROG Serene In-Line holder?
Yes. All FROG Serene bromine cartridges, including these yellow 150 g ones, fit both the floating and in-line systems. The green 200 g is the size made mainly for in-line hot tubs.
Is the 4-bromine bundle a better fit than the 3-bromine Cartridge Kit?
Pick this one if your tub tends to empty bromine in 3 weeks or less. The fourth cartridge helps close the gap to the 4-month mineral change.
Are the bromine cartridges yellow or green?
Yellow. This bundle uses the 150 g FROG Serene Bromine Cartridge. The green 200 g cartridge is sold separately.
Is the bundle cheaper than buying the cartridges separately?
It is priced the same as one mineral and four bromine bought singly at FROG's advertised price. The advantage is one order that clears our $50 free US shipping threshold.
Which cartridges go in first?
The blue mineral and one yellow bromine, together, at the start of the cycle. The other three bromine cartridges wait in the box until each one before them is spent.
What if I still have bromine cartridges left when the mineral expires?
Change the mineral at 4 months anyway and keep the unopened bromine cartridges for the next cycle. FROG says spent minerals stop working even if media remains.
What if I drain and refill before 4 months?
FROG says to replace the mineral at each drain and refill, so start a fresh blue cartridge then. A bromine cartridge that still has product can keep going.
Will a busy hot tub go through bromine faster?
Yes. FROG's manual says cartridge life depends on hot tub size and number of users, and higher dial settings release more bromine, so busy or larger tubs can lean toward 2 weeks.
Do I need a FROG holder to use these cartridges?
Yes. They work in the FROG Serene Floating System or a built-in Serene In-Line holder, not loose in a filter well. The Floating System starter includes the green floater.
Can I use a green 200 g cartridge after these yellow ones?
Yes. Each holder takes one bromine cartridge at a time, and either Serene size fits both systems, so your next bromine refill can be yellow or green.
Is this the same FROG Serene 4-Month Bundle sold by other retailers?
It carries UPC 722906005599, the same code used on the FROG Serene mineral plus 4 bromine bundle listed elsewhere, with one mineral and four bromine cartridges.
Does the bundle include test strips or Jump Start?
No, it is cartridges only. FROG Jump Start and test strips come with the FROG Serene Floating System starter, and both are also sold separately.
Does a FROG Serene hot tub smell like chlorine?
Much less. FROG says its slow-dissolving bromine creates far fewer odors than traditional chlorine, and the minerals let you run a lower bromine level.
Safety Notes
Handle With Care
- The four bromine cartridges are labeled Danger: corrosive, causing severe skin burns and eye damage. Wear gloves and eye protection when you handle or drain them.
- Do not open, break or refill the cartridge, and do not handle a damaged cartridge without protective gear.
- Strong oxidizer. Keep it away from heat, flames and combustible materials, and never mix it with other chemicals.
- Do not use it in a feeder or other device that has been used with calcium hypochlorite.
- The blue mineral cartridge carries a Caution signal word and is very toxic to aquatic life. Do not empty it into drains or ponds.
- Keep the spare bromine cartridges sealed in the original packaging, upright, at or below 86°F, locked up and away from children and pets.
Product Documents
Download the FROG Serene Floating and In-Line manuals for cartridge placement and settings, plus the Safety Data Sheets for the mineral and bromine cartridges.