Hello all, I have a 20 gallon tall tank with a stand that I want to turn into a saltwater tank. I was wondering what equipment I would need to run it. I have a top fin power filter 30 and a heater. I will buy a powerhead and want to know what else I would need for a basic FOWLR tank. The tank would have one fish and a few inverts. I was thinking 25 pounds of live rock? I am on a pretty tight budget so Saltwater tank necessities are all I need right now and I could slowly upgrade and buy things once I have enough money. I have kept Freshwater fish for awhile so I have test kits and am aware of the nitrogen cycle.Can't wait to here all replies!