Evolution Aqua Dual Union Check Valves Tabs/Packs rubber diaphragms and gaskets with

rubber diaphragms and gaskets with instructions

Interior mounting base raises the compressor off the floor to protect against flooding

API® High Range pH Test Kit monitors pH changes in marine aquariums

The entire compressor unit is protected by the Airmax® Composite Cabinet

Each gallon treats up to 250

Evolution Aqua Dual Union Check Valves Tabs/Packs rubber diaphragms and gaskets withEvolution 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