I've run my used Reef Octo 1000 INT for a few days with no collection cup I added the cup and am not really getting any bubbles "only have a super thin layer on top of the water column it's pretty much all tank water". It's a bit under 6 inches submerged in the sump "20 gallon sump" trying to keep it at the reccomended 5.5-5.75in submerged.
Any suggestions to get it skimming properly?
Any suggestions to get it skimming properly?