Aquascape® Protect for Ponds XT Size:128 Ounces (Gallon) you probably need a rebuild

you probably need a rebuild kit

The inside diameter of the pipe should be 1"

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

It is thermostatically controlled and turns the power on and off automatically

Aquascape® Protect for Ponds XT Size:128 Ounces (Gallon) you probably need a rebuildAquascape 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