Odd Color Change On Guppies

[Dreamer03]

A few weeks ago all of my guppies developed fin rot and turned all red. The fin rot was cured but they continued to be red for a while. Finally fomr oen dya to next they went back to their normal colors.  But then yesterday most fo the guppies are now blue.....is there any thing that can eb causing the color change? Or should I just be like..."this si awesome!!!!"

 

[Baccus]

The red could have been caused by a sort of chemical burn from what ever you used to treat the finrot, it could also have been a secondary infection which the guppies have now got over.
Not really sure why they would have now turned blue tho, unless they had the genes and just wheren't showing it previously.

 

[Dreamer03]

Some of them are about a year and a half old. But well to what im told they still seem perfectly fine. And the red came same time the fin rot happened, before it got treated. It just went away by itself.

 

[Baccus]

Maybe ammonia which caused the finrot?

 

[Dreamer03]

Ammonia when tested was zero.