Just a quick update with some pictures.

Still trying to get the Nitrite levels under control. Put the heater back in the system. I was told that the idea temp for the beneficial bacteria to do their job is between 76 and 85. My system is running about 67 right now. Gotta get it warmer. Hopefully this along with the added grow beds will balance things out. Got to get it right before I add any Tilapia.