Was dosing 2mL Vinegar into 30 gallons. I probably could have gone higher, but things were looking real good. I decided to overcomplicate things, so I added Vodka at a comparable dose, and immediately got cyano. I cut the dose in half and am slowly ramping back up. The cyano is still there but almost nonexistent. My nitrates were stuck in the 20+ range, and after about a month, slowly came down to the 5 range. Now they are hovering at just barely there. I know if I increase the dose I can push them down further, but like I said, things look good so I'm happy where its at. I still run a little GFO to keep the phosphates down. I'm trying to ween off of it but so far, I still need a little.