I have a 65 gallon tank, it has been running for about 3 years now with no sand. Most of my stuff are SPS corals and a sebae anemone, no LPS but I have quite a lot of red and blue mushroom hitchhiker on the rock from the bigger tank I had shut down more than 10 years ago. I have more than a hundred lbs of rocks including what is in the 40 gallon sump, and in the small refugium I have 2 inches of sand. I am having the ASM G3 protein skimmer, but I am going to change to a bigger one in the future. My main tank has 2 tunze that are over 3000 GPH together, and 3 Maxi Jet 1200. The return pump is the Eheim 600GPH. Lots of flow, my corals love it. I only use 1-400W 20000K and chnage the bulb every 8 months, and keep it turned on 10 hours a day. I feed my fish Mysis in the morning and brine shrimp in the evening. I tried to feed them pellets and flakes but have had no success. I know the frozen foods are making my phosphate level high but my fish are more important. I like to spoil them and have a fatty look (like me)
I feed my corals with Marine Snow twice a week as recommended. I also use Koral Color once a week.
Anything wrong here about my set up please let me know.