★★★★★
Prices start at : 28.95 USD / 2.00 lbs
Step 3: Replace every 30 days, and simply discard the used unit. Available in THREE sizes: Small (2-Pack): Treats up to 12,500 gallons Medium: Treats up to 50,000 gallons Large: Treats up to 1/4 acre (250,000 gallons) DIRECTIONS FOR USE: Step 1: Place...