I have a 36 gallon tank that contains substraight, live plants, three cory cats, five tiger barbs, a young parrot cichlid, and an algae eater. My parrot cichlid was doing great the first couple of months. Now it's shy and seems to sleep on it's side a lot. I have not seen any aggression in the tank. I am worried that he/she may be sick. Any help would be appreciated!