Oversized Skimmer Question

[b.clark]

I have a 75 gallon tank with sump that holds about an additional10 gallons of water. I have a classic 150s skimmer. Do you think it is oversized for my system. If so should I run water in the sump at a higher or lower level to help it or just keep it at the 7” level. Seems like it either runs really wet of really dry.

 

[208reef]

If your tank is really lightly stocked and you don't overfeed it might be a bit oversized, but on the flip end, if your 75 is heavily stocked and heavily fed, it might be just right or maybe even undersized. I would keep the height at whatever level the manufacturer recommends and run it on the drier end.