I tried this question in the equipment section with not much help so will try here. I bought a deep blue rr 75 rimless tank and currently designing a stand. First off I have years of cabinet building experience but need help with design. Obviously want a decent sized sump and looking at a 5 gallon ato. So far I like the newer eshopps sumps or trigger systems. The problem I'm running into is I would like a permanent wall on the far right side inside the stand that I would gain access to by a door to house my apex classic that would keep it separated from the sump area. Question one, how important is it to keep the apex out of the sump area? Others have suggested building a cabinet to house the apex and hang it on the wall, but not sure this would work for me. Second question of the brands I have picked what would everyone suggest for a good sump size or type.