I have a 150 gallon fowler with a 30 gallon sump. I only have 2 fish (porcupine puffer, Mombassa Lion, and a Golden Dwarf Eel.) I try and try and I just cannot get my nitrates down. The API test always comes up red (80+). I've been using bio-pellets and I got a new skimmer (Reef Octopus xs-200). Iv'e changed 15 gallons a day (that is my max) for 4-5 days straight and I cannot make a dent.
I make my own water (RO
unit) and I have tested the water to check if there were nitrates in it, and they tested 0.
I recently removed the sponges from my Eheim return pumps and I am going to start changing my filter socks daily.
Anything I am missing?