Clarifies and beautifies ponds. 100% live and natural biological formula reduces Ammonia, Nitrite, odors and sediment. TLC consists of live, naturally occurring nitrifying and spore-forming bacteria. Safe for all fish, invertebrates and plants, TLC works with pH control, aeration, filtration, skimming, UV sterilization and other techniques. TLC bacteria rapidly and safely consume waste, keeping the aquatic environment healthy. Reduce or eliminate the need for toxic chemicals to maintain pond and fish health.