Ecological Laboratories Microbe-Lift Pro Blend Liquid (1 Gallon) [Misc.] [Misc.] Keeps ponds clean and clear while reducing ammonia and nitrite levels. Dissolves away organic sediment and reduces foul odors in the water. Seeds and maintains biological filters and improves dissolved oxygen levels. Is effective over a wide range of pH conditions. Safe for fish. Helps their immune system and promotes growth.