I have a male siamese fish and up until today he appeared to be fine, since I switched the tank light on it appears his tail fins are all stuck together. I did a 30% water change yesterday and the temperature is fine. I just did a water test and all the Ammonia, Nitrates etc were all at low levels. Just wondered if anyone could help explain why? Or whether its a problem where I need to get some sort of treatment.
Thanks
Thanks