Veskas, would like to share my experience. Ever had a trate prob? I do. Wet/dry, and all that, well, as it turns out without significant liverock, and I mean alot, u will. there is a way aroung it. ever seen a hammer coral. yes, they are hard to keep, well, i saw one in a tank that was over 8 years old, 2 ft across. What did they do?What i wis i had in the beginning, simply create a "dead zone in the base of the tank". This promotes tons of anaerobic bacteria, which eat trates. It cost me 20 bucks to convert a 55, simple, a hardware store has all u need. its simple, all u need is 1" pvc, that plastic lighting stuff(looks like a small grid), and put screen over it. then, you simply put 4in of gravel, a layer of sand between, on top. This creates all u need with good flow.Remember that huge hammer i told you about, THERE IS NO WET DRY, just a blank sump for water addition and a good protein skimmer. I could not believe it, they had essentially recreated the ocean. They even had acrupora!! drop me a line if any questions, id rather save a life: eisenbahn@mindspring.com