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

Work really well for keeping your hot tub chemicals balanced. I struggled for months prior to getting this and now I don’t have to think about them really at all. Highly recommended. Minimal odor. Keeps water balanced and clear.

Great product, been using it for years. No issues.

Great products

This product works really well to take the headache out of adding in my bromine

Im using these in my hot tub for years. I didn’t convert to the new system. I use these with the floating device and it works well. This is a good price compared to Leslie pools and Chemex.

We have been using these for years. They make maintaining chemical levels in the hot tub so easy. They keep the water sparkling clear, and the chemical levels just right. Would recommend these to anyone using bromine in their hot tube. They are game changer for keep your water fresh and clean.

The frogs are fantastic

It is exactly what I ordered, arrived in a great time frame, well packed. I have used these items in our hot tub for the years we've owned it, never any issues