Just thought I would post an update. Somewhere back in this thread is my start post. I think it was the later days of June, so almost 2 months. I had zero NO3 and PO4 readings at the beginning, but crazy HA in the sump, and pretty good growth on one side of the DT. It has slowed to a crawl in the DT, but still in the same places. The sump has also slowed growth, but still pretty thick.
I have 500 mL in a BRS reactor that has stayed tumbling nicely the whole time. I have never had to shake it or break it up. Skimmate production has not been significantly different. One thing I have noticed is that the rock has started to grow tons of 'stuff' all over it. It looks like it did when I first got it shipped from the gulf with what can only be described as various kinds of filamentous mossy/lichen-ish stuff all over it about 1/8" long on average. It really looks 'alive'. Not sure if it has anything to do with the Ecobak, but it sure looks nice.
IMO, this is no 'cure-all', but it does seem to help keep wastes from becoming problematic. I have been able to increase feeding a bit as well as I was pretty skimpy before, and haven't had any problems.