Kasco® SureSink™ Self-Weighted Airline Tubing Part:Fittings ONLY - No Tubing The center of the membrane

The center of the membrane does not have slots and acts as a check valve when air flow stops

which requires that you be present at time of delivery

water hazards and retention ponds

Cutrine Plus Granular Algaecide is the granular form of Cutrine

Furthermore

Kasco® SureSink™ Self-Weighted Airline Tubing Part:Fittings ONLY - No Tubing The center of the membraneKasco SureSink self weighted airline tubing is a durable PVC composite available in diameters of both 3 8" and 5 8". This hose will not crack during cold weather and will remain flexible. 3 8" tubing should only be used in applications where total length is below 300'. SKU Description 773380 3 8" x 100' SureSink Tubing Kit (Includes Tubing and Fittings) 773385 3 8" x 500' BULK SureSink Tubing (No Fittings) 773300 3 8" SureSink Tubing Fitting Kit