Shrimp Feed Water Stability: How to Achieve >30-Minute Water Stability in Pellets

Water stability is more than a matter of how long a pellet remains visible in a tank. For shrimp producers, the physical integrity of feed affects nutrient retention, feeding behavior, water quality, and the practical efficiency of feeding operations. A pellet that breaks apart too quickly can release nutrients into the surrounding water before shrimp consume them, while excessive hardness may create other formulation and feeding concerns. Developing shrimp feed with more than 30 minutes of water stability therefore requires coordination between ingredients, moisture, conditioning, compression, and pellet structure. At FAMSUN, we approach these variables as connected parts of the production process rather than treating pellet durability as an isolated target.

Why Water Stability Matters in Shrimp Feeding

Shrimp feed behaves differently from many terrestrial animal feeds because the finished pellet enters an aquatic environment immediately after distribution. Water begins penetrating the pellet surface, and soluble components can gradually diffuse outward. The rate of this process depends on pellet density, ingredient composition, binding characteristics, surface structure, and the conditions under which the feed was produced.

A 30-minute stability target should be evaluated against farm feeding habits and production requirements of the farm. Longer stability can be useful where shrimp need sufficient time to locate and consume the feed, but simply increasing hardness is not necessarily the best approach. A well-designed pellet needs to maintain its structure while still presenting an appropriate texture and nutrient profile.

For producers developing feed for prawns, water stability testing serves as a practical quality indicator, particularly when comparing different formulations or process settings. Test results become more meaningful when they are linked with pellet density, fines content, moisture, and actual feeding conditions.

Binder Selection and Pellet Integrity

Binder selection plays an important role in determining how particles hold together after the pellet leaves the die. Different binders have different hydration, gel-forming, and binding characteristics, while their performance can change according to dosage and the other ingredients present in the formula. Starch-rich materials, for example, can contribute to binding after adequate moisture and thermal treatment.

The formulation itself also matters. Protein sources, minerals, fibers, oils, and other ingredients affect how particles interact during conditioning and compression. Rather than adding a binder simply to increase hardness, producers can evaluate whether the chosen ingredient system provides the desired combination of durability, water resistance, digestibility, and feeding performance.

At FAMSUN, we consider raw-material characteristics and finished-pellet requirements together when assessing processing conditions. For shrimp feed, this means binder selection should be connected with moisture management and mechanical treatment instead of being considered separately.

Conditioning and Die Compression

Conditioning determines how moisture and heat interact with the feed mixture before compression. Adequate conditioning can soften particles and promote the physical changes needed for pellet formation, while insufficient treatment may produce weaker pellets or inconsistent structure. Excessive moisture, on the other hand, can affect throughput and pellet formation and may increase the burden on downstream drying.

Die compression ratio is another important variable. A longer compression path can increase the mechanical work applied to the material, but the appropriate configuration depends on formulation, pellet diameter, moisture, and the desired physical properties. Using a single die approach across substantially different recipes may therefore produce inconsistent results.

For feed for prawns, the practical objective is to balance compression with the characteristics of the formula. Pellet hardness, water resistance, density, and production capacity should be evaluated together rather than optimizing one parameter in isolation.

Testing Water Stability in Practice

A meaningful water-stability program starts with a defined test method. Pellet diameter, water temperature, immersion time, water movement, and the criteria used to judge structural breakdown can all influence the result. A comparison becomes difficult if samples are tested under different conditions, even when they come from the same production line.

Testing should also distinguish between surface softening and actual disintegration. A pellet may absorb water and become softer while remaining physically intact, whereas another may lose particles rapidly even though its exterior initially appears firm. Recording these differences gives production teams more information than a single pass-or-fail observation.

Our work at FAMSUN takes finished-product requirements into account when considering processing solutions. The supplied palletizing information also notes that our palletizing robots use Japanese Kawasaki or German Kuka technology, with a focus on stable operation, simple maintenance, efficient space utilization, and flexible design. Although palletizing does not determine water stability, consistent downstream handling matters because excessive mechanical impact can create fines after the pellet has already met its initial physical specification.

Conclusion

Achieving more than 30 minutes of water stability is best viewed as a formulation-and-process challenge rather than the result of one machine setting. Binder characteristics influence particle bonding, conditioning affects moisture and heat transfer, and die compression changes the mechanical treatment received by the mixture. Together, these factors shape the internal structure that determines how the finished pellet responds after entering water.

At FAMSUN, we view pellet quality through the complete production route, connecting raw materials and processing conditions with the physical requirements of the final product. For shrimp feed, that perspective can help producers investigate why two formulations with similar nutritional values may behave very differently during immersion.

A practical approach to feed for prawns should be underpinned by controlled testing and process adjustment. Instead of pursuing hardness alone, producers can assess water stability alongside pellet density, fines, moisture, feeding behavior, and production efficiency. Such a balanced evaluation provides a stronger basis for developing pellets capable of remaining structurally stable for the required feeding period without making the process unnecessarily complicated.