I've had the skimmer running for four months now and still no foam head. It's a Gen2 and gave it a vinegar bath when I got it. I have it sitting in 7in of water with the return pipe halfway out of the water. All parameters are dead on I do weekly water changes and feed the fish thats all that goes in the tank no additives. Flow rate thru 20gal.sump is 550gph. I was wondering if anyone has theirs set up different then that with good results?


