Brass Water Fill Valve, 1" External Pumps It is made with a

It is made with a cast aluminum housing

Underlayment can be used on top of liner as well to protect from punctures when adding gravel

air diffuser

Will operate in as little as 19" of water

but stick with it and after the 2nd or 3rd treatment results should be noticeable

Brass Water Fill Valve, 1" External Pumps It is made with aAvoid the hassle of adding water to your pond with the durable brass 1" Water Fill Valve. Water is gradually lost due to evaporation and tiny leaks, and with the water fill valve mounted in your skimmer, the pond will remain filled at all times. Flow rate of the 1" Water Fill Valve is 38 GPM (2280 GPH) @ 15 PSI, 64 GPM (3840 GPH) @ 35 PSI & 70 GPM (4200 GPH) @ 55 PSI. Fill Valve measures 17" long.