The main issue I had with that design was, it would be nearly impossible to achieve any sort of dynamic balance. And if it became lopsided for some reason things would start to fail. Now, this could be over come with BIGGER motors, gears, bearings etc... but economically, it would be a dud.
I have a new RBC I am designing for my 400 gallon bait fish system. Right now it is 15.75" in diameter and 13" wide. Theoretically, the SSA (Specific Surface Area) is 1280 sq ft. The goal is an SSA of 2000 sq ft or more. We shall see if that happens. Pretty easy to build, and pretty easy to add more sections. It will weigh about 22 lbs (304SS construction) and will be rotated with a small gear motor. One idea I am thinking of is using a power head to create the rotation. I could try that.
