Evolution Aqua Dual Union Check Valves Size:1-1/2" SLIP Includes four extension tubes (3

Includes four extension tubes (3 black tubes and 1 clear tube)

Black) A00558 617750005584 120W UV Clarifier (220V

Feed 2-3 times per day for water temperatures between 56-80 Fahrenheit

Gallon BSE-55G EasyPro Liquid Barley Straw Extract

The Matala BioSteps II External Gravity Filter is the new and improved filter that replaces the previous model (BSTP

Evolution Aqua Dual Union Check Valves Size:1-1/2" SLIP Includes four extension tubes (3Evolution Aqua check valves are essential when using a waterfall filter in conjunction with a pond skimmer. The check valve will prevent water in the filter from back flowing into the skimmer when the pump is switched off and keep water in bogs when the pump is turned off and other purposes. Check valves are also essential when an external pump is being used. The check valve prevents the water from draining back into the pond or reservoir, keeping the