thanks for the info and which Tunze are you using? I was thinking of the Tunze 9004 but it looks like a surface skimmer so a AutoTopOff would help a constant water level.
I think for now, I'm going with a protein skimmer (HOF or in tank), heater, 2 small powerheads. I'm hoping the skimmer, rock, rodi
water and powerheads is enough to keep a 30 gallon tank clean. But I do have a old HOB
carbon filter if water test don't seem good enough.
It's a lot to hang in a tank but it will do for now until I can get better and move onto a sump system.