Aquascape® Protect for Ponds XT Size:128 Ounces (Gallon) It is available in both

It is available in both 1/2" and 1" sizes

4"H 103gph 250ml 0-75 R800128 Medium Side Flow 6

Do not apply to water intended for human consumption

you probably need a rebuild kit

the bacteria draw in dissolved waste (ammonia and nitrite) and oxygen to convert the waste into nitrate

Aquascape® Protect for Ponds XT Size:128 Ounces (Gallon) It is available in bothAquascape Protect for Ponds XT uses an all natural formulation of tea tree oil and other plant based polymers to protect pond fish. This special treatment reduces fish stress; helps prevent parasites or bacterial infections; and accelerates healing of superficial wounds, scrapes, cuts, and abrasions. It is great for use after handling fish, while performing pond cleanings, or while conducting water changes. It is safe for use with biological filters