320g build/journey/experiment DIY :-)

[abcha0s]

Originally Posted by Greenmaster

My theory is bacteria is converting the nitrate into nitrogen... or maybe the start of an algae bloom? Either way it's all good

Yes, but it's not quite so simple. If it were that easy, we would all have 0 nitrate in our tanks. Are you talking about Anaerobic bacteria and if so, where are they in your system?

My curiosity is sincere. The 0 nitrate reading surprises me. I know what "should" be happening, but can't explain where your nitrate consumers are finding a suitable anaerobic enviroment to thrive in.