Aquascape Clean for Ponds XT makes it easy to quickly optimize the quality and clarity of pond water while drastically reducing filter maintenance, keeping ponds clean, clear, and beautiful. Clean for Ponds XT is available in half-gallon and gallon options and designed only for use with the Smart Pond Dosing System XT. Clean for Ponds XT uses a powerful blend of heterotrophic bacteria to naturally digest organic waste or sludge caused by uneaten fish food, fish waste, and decomposing leaves and debris. The high concentration of bacteria will work to clean between rocks and gravel while keeping pond filters clean, including filter mats and biological filter media. Clean for Ponds XT is safe for fish, plants, pets, and wildlife. Clean for Ponds XT is also available in extra strength, triple-concentrated formula (3X) for use in larger ponds or for extending the duration between re-fills.