My 50 gallon mixed reef.
Mixed reef with some soft coral, LPS, Zoas, and 20 different SPS frags, and other misc coral.
Basic box sump with enough room for the ASM G-1 Protein Skimmer, Iwaki MD-15RLT Pump for return.
400 Watt MH (10k bulb i think?.) with one small Bahama Breeze fan for the heat...