Ok, so over the past couple of weeks, the cyano I thought I'd gotten rid of (phosphates were leaching from some premade frag rocks I picked up) came back with a vengeance.
I thought it was because I stopped running as much GFO, but let's be honest, that just fixes the symptom, not the cause. So I started checking everything and finally tested the RO/DI water straight from the filter........well that was it! I generally check it every couple of months and was only a month in from the last test. Now it's pumping out "fresh" water with a .25 phosphate level.........grrrrrrr.
So I just ordered new filters and have decided to test more often and I really should keep an extra set of filters on hand. Sigh!
I thought it was because I stopped running as much GFO, but let's be honest, that just fixes the symptom, not the cause. So I started checking everything and finally tested the RO/DI water straight from the filter........well that was it! I generally check it every couple of months and was only a month in from the last test. Now it's pumping out "fresh" water with a .25 phosphate level.........grrrrrrr.
So I just ordered new filters and have decided to test more often and I really should keep an extra set of filters on hand. Sigh!