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The frog system works well for me in the 5 person spa. The mineral cartridge is a must however the bromine cartridges are not the most economical but they are the most convenient. Sometimes I don't use the cartridges and just add bromine powder after each use. The brominating granular is cheaper but I like the convenience of the frog cartridges so I use them most of the time. It's also nice that once you find the right cartridge setting it maintains the bromine level very nicely.
Verified purchase: Yes | Condition: New
We have owned hot tubs for many years and they have always been frustrating to keep everything in balance. We've been using the "Spa Frog" system for about a year now and have been very impressed how the "Mineral" cartridge keeps the PH, etc. in balance and the ."Bromine" cartridges keep the bromine right. You use three bromine cartridges for every one mineral cartridge. Much easier than constant adjusting with chemicals.
Verified purchase: Yes | Condition: New
Product works great with no mess nice system for hot tubs.
Verified purchase: Yes | Condition: New
Product was as expected
Verified purchase: Yes | Condition: New
Nice that it contains an entire 3 month supply of chemicals and its a great price.
Verified purchase: Yes | Condition: New
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