I recently introduced a red-tailed shark to my community tank, and immediately the shark had little white ich-looking spots all over. The temperature went up to 86°, and the shark is doing great. Everyone became much more active, including the normally reclusive kuhli loach, suddenly swimming all around the top. This morning I noticed the loach swimming in spirals and running into obstacles. Is this due to the too-hot water? If I decrease the temperature too soon will I be risking re-infection for the shark?


