Recently my false perc clown has been acting wierd...he keeps touching his mouth against the frogspawn coral I have, almost like hes kissing it. Then I noticed he was keeping his mouth open wide for long periods of time. Today his mouth is swollen and open. There aren't any other signs of illness. Could this be a bacterial infection? Lack of minerals or too much (i've been using tap water for water changes instead of bottled for the past month) ? Could it be an injury, like a sting? I have frogspawn, elegance coral, polyps and different anemones, a clam, some shrimp, a cucumber, bubble anemones and i noticed an aiptasia.