I built a new 120 gallon tank one year ago today and after four months I stocked my tank with all SPS and just a few zoos from my old tank and I lost almost every one of my SPS. I built this tank to be an SPS tank but I must be doing something wrong. I've been reefing for 7 years now so I have a good grasp at the basics. I've learned a lot from this site. My acros died. My super man monti is just starting to come back and my brain coral is hanging on by it's finger nails. If you go to my profile you will see the corals I bought, I'm not sure if they qualify as easy or hard to keep corals.