I have built the tank part of my sump out of 1/4" glass, but now I need to figure out how to do the internals of the sump. I have a plan, but would like some opinions on it. I figure making two biological filtration chambers, one with bio balls and the other will lava rock. Here is a schematic for it. The dimensions of the sump are 24L, 12W, 12H. I figure making each bio chamber 6" long.