Evening all, I'm in the midst of setting up a 450 L-shape tank (6' x 4' x 32"). It's made of 1" acrylic in the front and right side & 3/4" on left side and back. It has a 2" tubular steel around the perimeter that is powder coated. Gen of KritterTanks built it and did a great job ! Here are some of the equipment I'm thinking of using: Lights-400 watt coralvue dimmable ballast w/lumenbright reflectors. Protein Skimmer-Reeflo Prokit or H&S 250 in sump model (to save some space). Calcium Reactor-Deltec PF601S (keeping mostly sps w/some lps). Denitrator-H&S 150SR (I do like fish and would like to keep some shoals of anthias, but would like to keep nutrients down). Return Pumps- 2 Reeflow Dart Golds (I'm thinking of using a Oceans Motions or manifold). Contoller-Reefkeeper Elite or New Aquacontroller. Water Movement-An array of Vortech Pumps and Tunze Streams. Sump-100 gal Eco system sump (I don't know if I'm going to actually use miracle mud) Refugium-I would like to employ a gravity fed fuge on the upper left part of the tank. That's all for now...I would appreciate your inputs !! Jim p.s. tank shots can be seen a www.krittertanks.com (the last 2 shots are my tank).