I will be moving to a new apartment in one month and will unfortunately have less space for my tanks. I've been contemplating whether to build a single rack for a select number of tanks I will be operating. The rack will be made of 2" x 4" wood and will be 3-tanks high, with the top row in a "step" configuration. What I really want to try out is utilizing dado joints for support, which will make the rack look more appealing, yet be relative sturdy. Here are some sketches I came up with (click to enlarge):
I currently have six 20 gallon longs and 6 10 gallon standards (along with various other tanks that will not be on this new rack), all on metal stands that hold two tanks each. With this new rack, I will downsize to only two 20s, placed on the bottom row, then three 10s directly above that, then the remaining three 10s a step above that.