return pump

I have a Jebao DCT-1600 that I run at 1/3 power. I also have a Eshopps overflow (drilled) and a gate valve to tune the system. Lately, my overflow box has shown a very variable water level. Sometimes the water will be really low and sucking air through the stand-pipe in the morning and then...

Mighty Jet DC Return Pump (Midsize: 538 GPH)