The BEST formulated aquarium remedies for hobbyists and professionals-our products have been on the market for more than 30 years (since 1964). We have firmly established our leading position as the manufacturer and marketeer in this field. All our products are scientifically tested in our laboratory before being releasing to selected fish farms for final evaluation. When the effectiveness of the product has been confirmed and supported by various experiments, we then market our products to the hobbyists with full confidence. When used as directed , all "RID-ALL" remedies are NON-TOXIC, biodegradable and the residual medicine "RID-ALL" can easily be removed by filtering over activated charcoal. Bacterial resistance to "RID-ALL" range of aquarium remedies is not likely because "RID-ALL" PRODUCTS are specially selected chemotherapeutic compounds and do not contain any antibiotics. We trust that the correct usage of our products will make aquarium fish keeping a breeze and pleasure to hobbyists and professional breeders alike. Remember that your fish depends on you to give them the best medication when they are sick. So please do not fool around with the life of your pet fish by giving them imitations or sub-standard medicines-it's not worth the risk or the savings.