Thanks! I have about 8 gallons of bio balls filling each of the weir in the overflow. Then I have a 40g breeder tank filled with more bio balls and tons of matrix. Then it goes into a 55g plastic drum that has more bio balls then finally into k1 moving bed. Every stage there is mechanical too. It's over filtered to the max.
To get the aro Comm to work I knew when they got to the 10-12" mark I had to keep them overcrowded so they dont kill each other.... that's why the over filtering for only 180g.