Hello,
I recently obtained 8 kuhli loaches from my LFS and noticed that two or three have really pink/faded sides, whereas the others have pronounced dark brown/yellow striping.
I've read faded color on a kuhli can be caused by parameter issues, water changes, ect. My parameters are solid, and I do a weekly 25-30% water change. My question is: Why would only a couple of them have this discoloration? Is it age related, genetics, or something else I may be overlooking?
At first I thought it might be because I got two different types of kuhli loaches, but all of the patterns and sizes reflect the standard Pangio Kuhli that is most common in the hobby.
Please take a look at the attached pic and notice the difference in coloration between the two.