I think your cuc is enuf for now also. Likely not enuf to clean in such a new tank. Any way to open up that rockwork to allow for swim thru holes? 2 or 3 of them. Looks too much like a wall. Believe me, your critters will be happier and so will you as they swim thru the holes and peer from them. I found it much more pleasurable to see them more. Feel free to lean rocks on the back wall to support them and your holes.