Pond Doctor Anti Ulcer is an advanced treatment against many of the harmful bacterias found on ornamental fish. Anti Ulcer although powerful is safe on most ornamental species. Anti Ulcer is especially effective against open wounds and ulceration on large fish such as koi. Anti Ulcer treatment is a very effective way of disinfecting ponds and fish against harmful bacteria. Effective against Ulcers, Ulcer Fungus, Body Rot, Red Vent, Fin Rot, Frayed Fins, Sores, Damage, Dropsy and many other ailments. Category – Fish Treatments and Medicines, Pond Anti Parasite and Fungus Treatment.