Both tanks were the same water quality and temp. I tested both waters yesterday. Nitrite 0. Ammonia was between 0-0.25 ppm. Nitrate was between 0-20ppm. I moved them because they seemed to not have enough room. As soon as I moved them they started eating all of the algea, all 3 in a row. Now one died within an hour. I don't think I should move them back as I think it would stress them out more. Tank has lots of hiding spots with fake and real plants. I don't know what I should do.