I've got two Maxijet PH1200 powerheads for my 35gallon tank, which will turn over close to 20 times the tank's volume an hour. And, they're very powerful, and create a LOT of turbulence and watermovement. Too much really.
I was thinking of leaving them both off during the day, and just having the (still quite hard) output from my Eheim filter on, and then turning both powerheads on during the night for 12 hours, ie. when my fish are most likely to be asleep, so that they can chill during the day, and then I can do all the aeration/watermovement etc. during the night.
Even having just one on all day seems a lot!!
What does anyone think?