Our " Ei-Giene" Sterilising Tablets are for the effective sterilising of Whirlpool & Spa systems. 50 x 2g tablets supplied in a child tamper proof container. For effective sterilisation of your whirlpool spa bath system place 1 sterilising tablet into the water after bathing leave the whirlpool system running for approx 5 minutes turn off the system & empty in the normal procedure. This will leave your system fresh & sterile.