Is this RTN? Will is spread to other frags?

[fishface NJ]

Are you dosing nitrates?

 

[Biff0rz]

Are you dosing nitrates?

I was but only when it dipped to around 5. I've been very careful only to add when needed. Just tested phosphates and they are high (.25). I bought some cleanup crew and have been giving them Veggie rounds. My guess is this is creating the high po4/no3. I'm going to do a large w/c today like 50%.