so i put four small cichlids in a 35 gallon tank about a week ago. a few days in i noticed that one ofthem seemed to have a yellow spot on its anal fin and just today i noticed another had two of the same spots. are these fish getting sick? there is alot of algea forming in this tank so i have been covering it with a sheet idk if that would have anything to do with it but i figured i would let you know. the fish seem to be swimming around normally i am just concerned with these spots. the other two cichlids do not have any spots. thanks in advance - Dave