Hi. I used to have a Coralife PS and the thing sucked. Tried everything to eliminate micro bubbles but when this was accomplished would flood my living room.
I then went and purchased a Nano 9002 and put it INSIDE my 29 gallon tank. I have since moved to a 50 gallon tank with a refugium/sump. Keep in mind that the Tunze will need a pretty even level of water height to work properly. Use some type of auto top off, lots of DIY ideas around. I saved my cake and bought the Tunze osmolator. What I will say is that with 75 gallons total now that little sucker is performing great. For the money you can push these things beyond their rated capacity and performance is there. When I move up the next level it will only be a Tunze. I will DIM on a few things, but protein skimming is critical. There are some things you don't skimp on.
Hope this is of some help.
some call me frank