Swimming pool system

I have set out to build an home Aquaculture system. I have wanted to and studied for years to start this system and I finally got the chance. The idea is to raise fish in a small above ground pool. What I have now is a 10' by about 2' Intec pool from Walmart. I have two 55 gallon drums one is for solids and the other is a biofilter. The whole system should run on a 500 - 1000 gallon per hour pump. I am going to start with about 50 catfish in the 4" range. This is a small quantity of fish but I want to work the bugs out as I go. This is what I have so far.