Ulns lowering po4

[Chase31]

So how does everyone keep p and n down to 0? Iv been using Prodibio and I'm not sure if it does anything. I think it does cuz my corals look good. I want to try zeovit bit due to my 2 weeks on 1 week off schedule my girlfriend does all the matience and feeding, so I'm looking for an easy or automated system I can put in place. Are their any low matience system I can put in place? Can I run gfo with Prodibio or bbiopellets or should I? Iv been having some hair algea issues so that's what I don't want to get to out of control.