Originally Posted by asylumdown (Post 878841)

A little off topic, but I think you should look for other reasons your fish died. A sudden change in Phosphates from even a a few tens of ppm to 0 ppm would not have had any effect on a fish. I'm not sure any change in phosphate at any range would affect a fish, unless the phosphates were near toxic levels to begin with (which for a fish would be very, very, very high).

Originally Posted by neoh (Post 878844)

It wasn't because of phosphates, read the post again. ;)

Originally Posted by neoh (Post 878588)

I used Rowaphos until switching to a high capacity GFO from BRS. When I ran out, I switched back to Rowaphos, which I noticed an almost immediate change in PO4 and algae outbreaks. But I also lost a couple fish, which I attributed to using too much, which then stripped nutrients from the tank causing their very unfortunate demise.