sounds like you have the top or the "open water" pretty much filled - -might look into a goby or blennie for the floor - just becarful as they need extra food if you have a really clean tank and different species of them eat different things - -the other thing is ...make your choice and get some pics of healthy ones before you buy - -I just brought a banded Goby home last weekend {went for an algae blennie and was talked out of it} and he died with in 4 hours - - turns out he was totally starved and the acclimation was the straw that broke his back - -very sad, he was a pretty lil fella - - just do your home work and shoot for the lower areas in your tank - -good luck. The Boss
