Chlorine Tablets 100 Pack–Slow Release Pool & Hot Tub Cleaner, 1 Tablet per 600L
Chlorine Tablets, 100PCS Multifunction Chlorine Tablets for Hot Tub, for Swimming Pool Spa Hot Tub Cleaning Tablets, 1 Chlorine Granules per 135 Gallons (600 Litres) of Water. Slow and even dissolution.