Quote Originally Posted by fishmania21 View Post
I Got a cube 24 x 24 x 24, with 3 fish and coral in it. just do water change 10 gallon per 2 weeks. never got a problem. everyone happy and healthy. Just my experience
How long have u had it setup? How big are the fish? What type of coral?

If you don't have a way to export the nutrients, it will build up. Your phosphate will be out of control. Your tank might look healthy now, but you will see problems 6 months to a year down the road.