PC's are usually sufficient, the rose will probably find a place up high. Under MH's they can rest closer to the bottom of the tank comfortably. Those guys will move when they aren't getting the right conditions, so watch him. They can move right into your power heads. And that's no bueno.
They will seek out a location with adequate light as well as the right rock formation. They like some type of cavity to hide in for protection. A concave rock works best. Something with a depression they can sneak into if they feel threatened.
For better growth feed weekly or semiweekly krill or silversides, if you can find them.