They've gone  Or at least they are hiding! Well after treating Sunshine with melafix and pimafix for 7 days, I did about a 50% water change on Wednesday and everything seems to be going well. Last night I tested my water and everything was good but my nitrate reading was zero! I thought I'd made a mistake so I gave up and re-tested this morning and I got zero again.

Now with melafix in the past I've had experience with it making nitrates drop because with Clementine when I was treating her for that little bit of fin rot, before treatment nitrates were 20 and after it was 5, without doing a water change. Does anyone know why this would be?? Is it true or am I getting a false reading?? I don't think nitrates being at zero is good, but I don't know if it is really bad either. My tank is not re-cycling because everything else is as normal.

Thanks Nossie. I wasn't too sure.

I think that would be right, as I've seen it happen before. Still no trace of nitrates but I bet they start showing up after another water change.