Added a used HOB 1.5 to my 40 gallon all in one tank. But the skimmer keeps overflowing, creating way too many bubbles. I already tried adjusting the cup to the highest point, but it’s still overflowing. Don’t know if this is a dumb question, but not sure what I could do to fix the issue.
Let me know if you guys have any tips or ideas on what I need to do