Fiberglass Extensions for Blue Thumb Large Pump Canyon™ Summit Chemical It’s a product that provides

It’s a product that provides aeration

while the feet are 17" wide

Includes cleaning indicator

where nighttime temperatures can drop below 55o F

Fiberglass Extensions for Blue Thumb Large Pump Canyon™ Summit Chemical It’s a product that providesThese fiberglass extensions for the Blue Thumb (formerly PondBuilder) Elite Large Pump Canyon are constructed in both hoop and helical wrapped fiberglass, providing maximum strength and rigidity. Only for use with Blue Thumb Large Pump Canyon ALL fiberglass extensions require split lid SKU Description BP00405 Fiberglass Extension, 18" x 18" BP00406 Fiberglass Extension, 18" x 24" BP00407 Fiberglass Extension, 18" x 36" BP00417* Fiberglass Extension,