Black molly tail going silver

[DannyW]

Hi new member looking for advice. We have had a few black mollies in a new setup for around 2 months and the male seems to have had a change in his tail. It seems narrower, almost curved and is turning a silver colour.

This has been slowly changing over the last few weeks, water is fine and all other fish been healthy and no issues. Is this something we need to do something about? Attached a few photos to see if this will help.

Thanks in advance for any help

 

[charliebankston]

It's got an issue of some type causing clamped fins. It might be a parasite, ie flukes or worms or lice, or water conditions

 

[charliebankston]

Check you ammonia, nitrites and nitrates first. Then try a general parasite treatment medication

 

[DannyW]

Thanks, tested ammonia and nitrates which were at 0ppm so have put in a general treatment and see how it gets on.

 

[charliebankston]

OK cool, hopefully it gets better. Good luck!