Could also be sand stuck to the slime coat of the fish.
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
It is possible to have an ich-free tank. I've done it. I feel so much at ease knowing they are ich-free. 30 years and there is no med for ich, just snake oil. Only Copper and TTM is good.@Redfoxtang
People go insane trying to "sterilize" their tanks this is not only bad for the inhabitants it is impossible to accomplish.
Thirty years ago, ich had a greater prevalence in the hobby and we have many if not all the same medications to treat it. Why would this be? I watched the advent of the new and fancy wet/dry systems and shockingly ich prevalence began to decrease dramatically. Funny that.
I read very carefully people's posts that is why I quote and respond to each point I take issue with. I read your post and I responded. I quoted you as saying (writing) that EVERY tank should have adequate flow and oxygen. I am not quoting here because I have already quoted you and I stand by what I said.