Freshwater™ 5-Way Test Strips for Spas and Hot Tubs fabric cover cleaner protectant There is a lighter gray

There is a lighter gray version of this pillow that came standard on these models

compared to the 50 Sq Ft

The Freshwater™ MPS Test Strips monitor the level of oxidizer (MPS) in your spa

Size: 24 fl

The FROG Serene® (Bromine) Cartridge is for use in the Serene In-Line or Floating system for hot tubs and spas

Freshwater™ 5-Way Test Strips for Spas and Hot Tubs fabric cover cleaner protectant There is a lighter grayFreshwater 5 Way Spa Test Strips, 50 count These easy to read Freshwater 5 Way Test Strips test for: FCL (free chlorine) Bromine pH Total Alkalinity Calcium Hardness For use in salt systems, granulated chlorine silver ion systems and bromine floater systems.