Blagdonsanti ulcer fromerly known as interpetis a treatment for your fish if they are ill due to the following diseases ulcers pop eye swollen eyes dropsy swollen body hollow belly or bacterial gill disease fish gasping this fish treatment is supplied in an easy dose bottle and has been developed as a two dose treatment for all types of pond fish including gold fish suitable for treating ponds which contain a variety of fish harmless to filters all species of pond fish plants a