The quest for the best performing feed additive is a major mission in the aqua feed world. There is a variety of useful additives that raise the crucial debate regarding the selection of the best option. Acidifiers are functional feed additives with acidic properties. There are many organic acids available to the animal feed industry, including formic acid, acetic acid, propionic acid, lactic acid, fumaric acids, citric acid, sodium formate, butyric acids, sorbic acids and malic acids and the question is: how to choose the appropriate and most beneficial acid blend. Many factors need to be taken under consideration such as technological and nutritional aspects to achieve a unique blend that will able to be incorporated in aqua feed and offer the best solution.