FROG Serene Replacement Mineral Cartridge with 4 Replacement Bromine Cartridges for use with Hot Tub FROG Serene Floating Sanitizing System - Prefilled for Quick & Easy Hot Tub Maintenance

This product is great and also a huge savings compared to pool and spa stores. One set lasts at least 6 months (contingent on how much you use your spa). Installation is a breeze and the two day delivery is always wonderful.

Great price for 4 months bundled hot tub chemicals. Work great!

Quick delivery and original product!

Title says it all, if your hot tub will use these frog systems it is worth every penny, we have been using these for over 2 years and next to 0 chemical issues with our hot tub, not having to measure the different chemical just put the frogs in and check them as recommended, and drain and clean your hot tub as recommemded by your spa manufacturer, we would check our chemicsl levels once a week with the test strips but after 6 months and the eater always test normal, started jist checking about wvery other month.

These are excellent as a quick and simple way to add minerals and bromine to your spa if you have the Frog system. However they are fairly expensive for the convenience.Protip! When you are done using one of the bromine cartridges, you can pop the top off (several tutorials online) and refill them with your own bromine tabs. This will save you a ton of money down the road.

This is a very helpful, effective and convenient system for hot tub chemical maintenance.

Good value, easy to order, timely delivery.

great product