Hi, I am writing on here, because i cant find the bit i need to start a new thread, I had a platy fish that died a week ago, no visible sign of illness, but spent the last few hours at the bottom of the tank, looking like she was struggling to breathe, or swim. and sort of Shimmying....i asked advice all over the place, and was told it was most likely gill flukes? the next day another one of my platys had a white patch on her tail, so it looked likely to me (being a novice) that it could be flukes of some kind. I bought sterazin after getting advice from swell. co.uk and started to treat the tank (at just over half the normal dose as we have one baby) The white patch on the platy seems to be going now, and all the other fish except one seems ok, including one fry of a few weeks old..We have a pearly danio who has been hiding away on his own, and seems to be struggling to swim, he has been like this now for two days, I have been treating with the sterazin at recommended days for 6 days now.
I do not have a master kit, but my ammonia levels are on 0 and I am presuming as the fry is fine, and seems to be growing like a weed, that it is not the water that is causing the problem, I added a bit of prime just in case...does anyone have any ideas what could be causing this? The danio seems to be headed the same way as the poor platy that died, and I am desperately worried the others could follow suit unless I can find the cause??