ive lost over 20 fish in the last week from a diease i cant identify.my angels and red tail shark are bleeding around the head and gill area,my other fish lose colour in patches all over their bodies and my tetras lose colour by their tails.on sat i lost all 10 of my emperor tetras and by tonight the last of my female fighters will be dead(ive already lost 4 females and 2 males)ive lost countless other tetras and 2 algae eaters.just dont know what to do.please tell me what my fish have so i can try save the few i have left.