I bought a running 28 Nan0-Cube 5 months ago. It was full of Xenia when I got it and a few cool corals. Since then, I have added 4x the live rock, a bunch of corals, and upgraded to an AI Prime HD light. The biggest mishaps so far were the anemone stinging corals, so I 86'd the anemone, and I've had the 6 line wrasse kill a damsel and couple small crabs. Aside from that there is substantial coral growth and it looks amazing. I am considering getting one more fish, but not sure what would be exciting and reef safe for 28 gal. Flame angel is first consideration.