Answer by
BrendaG (6111)
Swim bladder disorder, ich, anchorworm, finrot, costia, cotton mouth, dropsy, and trichodina are some common diseases. Keeping your fish's living quarters clean is a must! If you must use gravel, keep to a minimum of one thin layer, as gravel on aquarium floor causes many problems for your goldfish. Change some of the water daily until fish is feeling better.