Hi to all u people out there! Firstly, I had a fish only tank (36"x18"x18"). Been keeping 4 angel fish, 2 damsel and 1 ballon clown for abt 4 mths. I also have two corals. its ok except the color is fading!!! Right now,I just brought a 36"x18"x30" tank and intend to use my existing overflow...