I’ve been having a cyno problem since adding lights. My tank itself is over a year old but I added 4bulb t5 about 3 months ago and boom cyno….. I have two power heads and wondering if I should have a third to keep it off of the rocks. The source I know is high P0 4 at .7. This is way lower than when I first started. Just trying to find the right flow to keep it off the rocks so my frags don’t get covered. Don’t mind the clown she’s enjoying the cyno on the rock The second question what’s a good return pump that doesn’t vibrate at all?