Eco-balance probiotic bacteria - H2O-pure choose the size best suited for your system._x000D_ 4 oz bottle treats 120 gallons (454 liters)_x000D_ 8 oz bottle treats 240 gallons (908 liters)_x000D_ 16 oz bottle treats 480 gallons (1,817 liters)_x000D_ 32 oz bottle treats 960 gallons (3,634 liters)_x000D_ 64 oz bottle treats 1,920 gallons (7,268 liters)_x000D_ 128 oz bottle treats 3,840 gallons (14,534 liters)_x000D_ 5 gallon bottle treats 19,200 gallons (72,670 liters) a multi-strained probiotic_x000D_ promotes optimal water quality_x000D_ blocks out unfriendly bacteria probiotics for core syste