I am with a lot of forum help going to set up a 90 gallon corner flow tank with the depth being 24".This tank will have a oak 17" tall canopy,open in the back.I want to have this tank heavily planted.In the book Encyclopedia of Aquarium Plants by Peter Hiscock he says if you go to this depth you sold consider metal halide's.What do you think?And does anyone use the All Glass MegaFlow #3 sump filter?