I currently have a 20 gallon frag tank... I have a sump and skimmer its barebottom tank i am going to remove my frags and racks for the new clownfish. I bought a breeding pair of gold striped maroons. My question was should i add live rock to the tank sand or anything??? the sump has a ton of live rock just wasnt sure about the main part of the tank. Anyhow thanks in advance...