FROG Serene Replacement Mineral and Bromine Cartridge Kit for use with Hot Tub FROG Serene Floating Sanitizing System - Prefilled for Quick & Easy Hot Tub Maintenance - 3 Month Bundle

This is the product that changed my hot tub system. Makes it so easy to keep clean now with less chemicals. Stabilizing the water for a longer time. No more chlorine smell great quality and functions great.

If you have a frog spa theater this product works great.

Came on time and it works very well. I’m very pleased with the product.

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.

Easy to use

This system is better than the other frog ball type system. It seems to last a little longer and the cost is lower.

for hot tub- works as expected

This brand/supplier offers a very good filtration system for spa water.