I'm plumbing a frag tank into my system with the helpful advice of some very knowledgeable and experienced club members. [Thank you very knowledgeable and experienced club members.] I need a place to safely harbour frags since the fish are hard on them in the display tank; I do already have a hang-on fuge w/rock-sand-microalgae. My question is: Is there any benefit to placing mirror or, say, aluminum foil under the frag tank or on the sides or back for the purpose of reflecting light around more? Or is that a stupid idea? [I sure come up with those now and then.] Also, the frag tank is a 20 gal high. Is it necessary to think metal halide or can I get away with single blub strip lighting, which I already have? My frags will be up off the bottom of the tank on a shelf in a bare bottom tank.