I have a 40 gallon reef tank with a 10 gallon sump with 3 coral doing well. I am going to be adding a lot of coral soon and more rock and advice on what i need to make sure i can keep that amount of coral. Any advice is greatly appreciated.
Above all figure out want you want to keep in the tank. In your casr, you want corals, so don't go all out on addint too many fish. You'll be able to maintain higher quality water easily when you have less fish.