I have the 24" to 36" model orbit marine and it's great. It's a 25 gallon tank with an aqua clear 70 and 2 hydro 565's and a cheap Chinese skimmer ipx8 that works great. Anyway, I have the lights on the tank 13 months. I had green damicornus, pink and hyacinth birds nest, red Montipora of which has since outgrown the space I had for them and were given to a family member with a larger tank. Now I have a sunset Montipora that's growing amazing, trumpet coral various acans and a Micromussa, various Zoas a Kenya tree a Duncan that started with 3 heads now has 8, and a pavona that started as a 1/4 inch piece is now the size of a softball. All lps, Kenya and the pavona are on the sand bed the Montipora is in the middle third of the tank and the Zoas are scattered. I hope this helped some.