Spa Shock Size:3kg and other hot tub hardware

and other hot tub hardware that is in contact with water that has a calcium hardness level below the recommended range

This little cube packs a lot of punch

1 x MSS25011 Cube - Swim Spa

as phosphates are nutrients for algae

sunscreens

Spa Shock Size:3kg and other hot tub hardwareSpaBoss Spa Shock is a non chlorinating shock treatment for Hot Tubs. Spa Shock is an oxidizer and can be used with chlorine and bromine sanitizing products. It also works quickly in oxidizing many kinds of contaminants that reduce the effectiveness of your hot tub's chlorine or bromine. When used regularly, Spa Shock helps to reduce chlorine or bromine demand by removing those unfilterables. Spa Shock will not affect the water's pH level. Spa Shock