Coral Vue Technology ACV20101 Super Reef Sump Skimmer, 5-Inch, 125gal

Great product. I run on a 90gl I should have the larger version, now I know. The water level in sump has to be so low since the skimmer is smaller. In order for return pumps to run and the skimmer at the correct level for the skimmer I have to add 2-3 gallons of water every day. If I add more so I could go every other day skimmer won't work. And if I'm late adding water it will be blowing air killing the coral.