Probiotics for Core System Health Use DrTims Eco-Balance Probiotic Bacteria to Promote Optimal Water Quality Eco-Balance Multi-Strained Probiotic Bacteria helps with the following: Maintains a balanced, healthy aquarium environment Blocks out unfriendly bacteria Promotes optimal water quality 100% Natural The normal processes in an aquarium cause the system to become unbalanced, allowing unfriendly bacteria and algae to dominate and negatively impact water quality. Eco-Balance uses friendly, 100% natural, probiotic bacteria to help reduce the numbers of bad bacteria in your aquarium. Use Eco-Balance on a weekly basis to restore and maintain a clean, balanced, healthy aquarium. Product Bottle Size (oz) 2 4 8 16 32 64 128 Amount of Water Treated (gal) 60 120 240 480 960 1920 3840 Amount of Water Treated (L) 227 454 908 1817 3634 7267 14534