I have a white comet in a 220 gal pond it has been their for about 4 years now. But recently I have noticed that its scales appear to be turning black/deep purple starting from the underside of the fish. Sorry I cannot get a picture.
Ph is 7, Amm. 0 Nit. 0 nitr. negligable. the water temp is at the moment about 20 degrees. The pond is planted and filtered. Water is topped up weekly due to evaporation and a partial water change every 4 - 6 weeks, When I clean the filter pads. (yes I do use pond water to clean filterpads). Any ideas? Should I be worried? Oh it is not happening to any of the other white comets.
Thanks in advance.
Ph is 7, Amm. 0 Nit. 0 nitr. negligable. the water temp is at the moment about 20 degrees. The pond is planted and filtered. Water is topped up weekly due to evaporation and a partial water change every 4 - 6 weeks, When I clean the filter pads. (yes I do use pond water to clean filterpads). Any ideas? Should I be worried? Oh it is not happening to any of the other white comets.
Thanks in advance.