Aquascape Protect for Ponds XT uses an all-natural formulation of tea tree oil and other plant-based biopolymers to effectively protect pond fish. Protect for Ponds XT is available in half gallon and gallon options and designed only for use with the Smart Pond Dosing System XT. The special formulation effectively reduces fish stress, prevents parasites and bacterial infections, and accelerates the healing of superficial wounds, scrapes, cuts, and breeding abrasions. Protect for Ponds XT is great for use after handling fish, performing pond clean outs, or conducting water changes. The treatment will not discolor pond water and is safe for use with biological filters. Protect for Ponds XT is safe for fish, plants, pets, and wildlife. Protect for Ponds XT is also available in an extra strength, triple-concentrated (3X) formula for use in larger ponds or for extending the duration between re-fills.