Water stability is the most important quality feature in sinking pellets production

Making sinking pellets, needs expertise not only to formulate the right ingredients but to produce the right texture with a fast sinking rate. Water stability is critical in sinking pellets production and must be controlled at all stages of the process because this type of aquafeed has to preserve its physical form and quality, to avoid the loss of nutrients in the water.

When the pellet is stable in the water for hours, you are going to assure a great part of the bottom feeders will eat it, and at the same time, you will avoid water pollution due to the dissolution of ingredients.

Sinking feed can be pelleted or extruded

To make water-stable sinking feed, you can choose between pellet mills or extruders. Contrary to floating pellets and slow-sinking pellets that can only be extruded. When you use a pellet mill, the previously ground and mixed ingredients are pressed into the pellet die and steamed for better compacting, resulting in a dense feed. This is a more economical process compared to extrusion. Besides the lower costs of processing, there is also a lower risk of losing vitamins in pelleted feed, but it needs to use higher amounts of starch and higher quality raw material.

On the other hand, the extrusion process gives you the versatility to produce granulates of different sizes, including micropellets. Moreover, it can also make floating, slow-sinking, and sinking pellets, with better water stability, and a better feed performance due to a higher digestibility of extruded feeds.

Whether you choose one or the other, it is important to take into account your feed formulations, the type of aquatic animals you are going to feed, the quality of the feed you want to produce, and your production and maintenance costs.

Include alternative feed ingredients in your sinking pellets

In aquafeed, fishmeal is the primary protein source due to its rich protein and fatty acids content. But as fishmeal production and supply, need sustainable improvements, you can use alternative protein ingredients in your formulations such as plant-based TVP or insect-based, to make sinking pellets.