Here's my 20gal tank. It's housing a huge purple LTA and a big RBTA. It's got a little hang-on whisper filter and is normally skimmed by an AquaC Remora. However, I ran a surface skimmer on the Remora, and forgot to top it off for two days. Then, the MaxiJet 1200 ran dry... So, the pump on the Remora needs to be replaced, as it's barely trickling water out right now. So, I hung my old Prizm on there to help skim until I can get a new MaxiJet 1200 for the AquaC. Lighting is a single 175 watt pendent with 10,000K bulb. It's got approx. a 4" DSB and somewhere around 20lbs of live rock.