NP pellets and bleaching events

[Delphinus]

Yeah, I played around with sulfur denitrators in the past. You nailed it in that you really need an ORP monitor for that. I didn't have one and I found it a challenge to dial in a flowrate that would remain steady state and still allow it to go anaerobic. I like the idea of those for something like a large FOWLR or predator tank.

The pellets are a set and forget thing, I like them that way they are super easy - but I just find it odd that there seems to be the occasional claim of bleaching. Very much in the minority but yet still often enough to dismiss it as a coincidence.