Fish aid Sulfa Forte is manufactured by fish aid and is a Pharmaceutical Grade Fish Antibiotic. It is made of Sulfamethoxazole 800 mg and Trimethoprim 160 mg. Right now it is available in 60 count bottles. fish aid makes the highest quality fish antibiotics available. Every bottle of Fish Sulfa Forte is safe sealed and has directions for fish and aquarium use and clearly shows the medicine expiration date.