Blue Thumb Formal Falls Kits Kit Size:Large 53% diquat dibromide is effective

53% diquat dibromide is effective for controlling duckweed

sludge and organic matter

Like most types of mechanical/biological filters

Measures 13" long

Blue Thumb Formal Falls Kits Kit Size:Large 53% diquat dibromide is effectiveBlue Thumb (formerly PondBuilder) Formal Falls Kits include the additional accessories you need to create a feature around your Formal Falls. These kits were designed to create an easy way to install a 24" high waterfall feature within a block wall structure indoors or outside. The basin can be sunk in ground or used above ground and comes equipped with dual pump access through a stainless steel access panel located just under the splash mat.