I went to bed last night and everything looked fine and i woke up and two junville chinese algae eaters and one juvenille red zebra cichlid were dead . none of the other fish are aggressive to one another beside one of the chinese algae eater chaes one of the others one around but nothing major plus i dont think he could of killed the reb zebra juvenille. I checked the water and everything looked normal. I just finished treating for ick and non of the fish that died had gotten it. Now i just noticed that my two baller sharks are up at the surfacegasping for air non stop and some other fish are doing this also. I have an air stone in the running all the time so it not a lack of air. Whats going on guys?