I got a FH thus past Tuesday evening. The potential problem is that when I bought him he was fairly colorful and not shy. For the past two days he is quite dark, no bars though, and swims around normal until any slight movement is made, the he hides. When he hides he looks like he is breathing hard, but comes out and seems fine. He has been eating well and the water parameters are fine. Am I just not giving him enough time to adjust or could there be a problem? Black Kuhli loach is only tankmate, but is hidden all the time.