Sulfur denitrator experiment

[Psyire]

I'm guessing your still cycling the reactor. Exactly 2 weeks would be about the time Nitrate spikes. (give or take 1/2 week)

I wouldn't do anything rash except maybe slow down the flow through the reactor if it's faster than a drip/second.

If you are still showing such high nitrate a week from now, then I would start to worry.

Double check to make sure your recirc. pump is running properly.