Hello folks I’m back after a few years off. I just got my 120 SCA box back running. I was very underenthused about getting it going after a move so I hired the guys from the LFS to put it together. It’s been running about a month and finished cycling. I have one lonely flame angel in there and a couple Zoas I put in yesterday. Parameters are all good. In fact a little too good. A couple weeks ago phosphates were about 2 and this week 0.0. Ran the test twice to be sure. I’m running carbon and gfo reactors. In a short time I’ve already screwed up something. The other day watching a BRS video I realized I was doing the carbon wrong. It was gently tumbling. So I changed it out and set the foam pads to hold it still. But I forgot to rinse out the charcoal first.(that was on another video). So I figure the tank got dosed with carbon. I wonder if that’s the same as vodka or sugar dosing? That’s my only explanation for the low po4. Nitrates seemed to be down from 5 to 4 also. Any thoughts?