<a href=showthread.php?s=&postid=6499830#post6499830 target=_blank>Originally posted</a> by Sindjin
Check this out:
My PO4 has been at .06 for a month straight. I figured it's not bad considering my UNCURED live rock is only 3 months old, right? For the past week or so I have had a cloudy tank which I cured with a filter sock. I tested my PO4 today and its up at about 0.1 ppm. "That's weird", I think to myself. So guess what I did? I tested my RO/DI Water I just made up. It tested 0.1ppm...just like my tank... I need to replace the Stage 6 Polishing filter.
So, is it safe to say that my tank water could actually be less???
We'll see, after I replace the filter cartridge!!