How close is the pump intake from the bottom of the sump? Do you have it sideways or straight down?
If it's pointing down you may want to position the pump sideways as to relieve back pressure on the pump or raise it by setting it on an inch or two of eggcrate.
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I told you not to be stupid you moron!(Stern)
Current Tank Info: 60 gal cube/20g tideline sump-mixed reef, Aquamaxx c-tech Ca Rx, Akula 160 skimmer, paxbellum N18, mitras LX7 lighting with T-5s, apex controller
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