ok Tom, well I have PO4 that is currently off the charts. I am now on my 3rd test kit to try and rule out a bad kit. I too, think I am a victim of bad Eco, but my PO right out of the tap is at 4ish, so what should I do to get it down or keep it lower? I have my NO3 up bigtimes to about 30 to sort of compensate for my skyrocketing PO4, but I don't think that is the answer either. My KH is about 4, artificially pumped up by me adding Bicarb, otherwise it is 1 out of the tap. Gh is about the same as well. I have trace NH4, but I am nearly due for a waterchange, and I dose EI, so adding PO4 is not helping, so I stopped a few days ago. My tank is 90 gal and my pH is about 6.7, but I see no outgassing anymore, when I used to have abundant pearling. Sounds like my parms are a mess...help?