Hi everyone, I have 2 kuhli loachs that have for the last 2 months been alone in a 10 gallon tank, They both started out black. But one changed to white after about a week. Then a bright red, and back and forth from black white red, sometimes it changes within half an hour. Other times it will stay a color for days. Has anyone ever heard of this? I'll be collecting pictures for the next few days.