Aquascape® Clean for Ponds XT Alpine Corporation Dimensions - waterfall weir is

Dimensions - waterfall weir is 11 inches wide a the front and tapers back to 10" wide in the back

Covers approximately 40 square feet per gallon (includes both substrates)

organic sediment

The space between the top cover plate and the inside top of the drain were the water passes through is 3/4" inch on all 3 sizes

Aquascape® Clean for Ponds XT Alpine Corporation Dimensions - waterfall weir isAquascape Clean for Ponds XT makes it easy to optimize the quality and clarity of pond water while simultaneously reducing filter maintenance! It contains a powerful blend of heterotrophic bacteria that digest organic waste and sludge caused by uneaten fish food, fish waste, decomposing leaves, or other organic debris. This concentrated bacteria cleans between rocks and gravel while also removing debris from filter mats and biological filter media.