Guppys Back Turning White

[Yanks15]

Recently did a water change and I noticed one of my guppies has scales turning white on his back. I don't know if it was like that before the wc or not but I didn't notice it before. None of the other fish seem to have any signs of this. I'm not quite convinced that it is a disease but maybe a reaction to something. The white is not fuzzy or saddle shaper around the body. Just straight from the dorsal fin to his tail. He is not acting any different than before. Any ideas? Water stats are pH-7.2, NH4-0, NO2-0, NO3-20 before wc. Need to test again. Temp- 80F.

Thanks.

 

[x2p]

Recently did a water change and I noticed one of my guppies has scales turning white on his back. I don't know if it was like that before the wc or not but I didn't notice it before. None of the other fish seem to have any signs of this. I'm not quite convinced that it is a disease but maybe a reaction to something. The white is not fuzzy or saddle shaper around the body. Just straight from the dorsal fin to his tail. He is not acting any different than before. Any ideas? Water stats are pH-7.2, NH4-0, NO2-0, NO3-20 before wc. Need to test again. Temp- 80F.

Thanks.

Does it look like this?

If so you may be running into ich.

Ich is believed to be a symptom of stress or changes in tank conditions, so the water change may have triggered it. The dots may be tighter but watch for any flashing and any spread of them.

 

[OldMan47]

I don't know what it is that you have on your guppy Smoke14. I must set things straight though. It is not thought that ich is a symptom of stress on this forum. Instead it is well known that ich is a parasite that exists or does not exist in a particular tank. A further myth is that a water change causes stress. A water change only causes stress in a completely ignored tank that has deteriorated to the point that the fresh water itself is a shock to the fish's system, because the existing tank water is so bad that any improvement is a large sudden change for the fish. When there is something amiss with the water in a tank, I do a 90% water change in the tank and always have the fish respond by looking much better than before the change.

 

[Yanks15]

Thanks for responces folks. It's not ich. I've had ich in another tank and it's not ich. This is more of a discoloration across his back. All the scales are white. I'm starting to think it's just his coloring but none of the other guppies have this from the same batch . I seperated him for now to see if he starts acting strange. If not, I'll probably put him back.