A fish feed pellet machine (also called a fish feed extruder) is a specialized piece of equipment designed to produce floating and sinking feed pellets for fish, shrimp, crabs, and other aquatic species. Using advanced extrusion technology, it transforms powdered ingredients like fish meal, soybean meal, wheat, and corn into nutritionally balanced, water-stable pellets.
| Feature | Floating Pellets | Sinking Pellets |
|---|---|---|
| Buoyancy | Float on water surface for 12–24 hours | Sink to the bottom immediately |
| Best for | Tilapia, catfish, trout, surface feeders | Shrimp, crabs, bottom feeders |
| Digestion | High gelatinization (90%+) for easy digestion | Good gelatinization, slower release |
| Feed monitoring | Farmers can see feeding activity | Less visible, suited for bottom dwellers |
Raw materials are ground into fine powder (under 0.5mm) and mixed with steam and water inside the machine. The twin screw extrusion system cooks the starch at high temperature and pressure. When the cooked dough exits through the die, it expands. For floating pellets, expansion creates air pockets that keep them on the surface. For sinking pellets, less expansion makes them dense and heavy.

Twin screw extruder – superior mixing, higher gelatinization (90%+), better digestibility
Adjustable pellet size – change the die to produce 0.5mm to 15mm pellets
High water stability – pellets stay intact in water for 2–4 hours, reducing waste
Stainless steel construction – food-grade, rust-resistant, easy to clean
Switchable modes – produce floating or sinking pellets with the same machine
Automatic operation – continuous production with minimal labor
| Species | Pellet Type | Typical Pellet Size |
|---|---|---|
| Tilapia | Floating | 2–6 mm |
| Catfish | Floating / Sinking | 3–8 mm |
| Shrimp | Sinking | 1–3 mm |
| Trout | Floating | 3–6 mm |
| Carp | Floating / Sinking | 2–5 mm |
| Ornamental fish | Floating | 0.5–3 mm |
| Parameter | Small | Medium | Large |
|---|---|---|---|
| Capacity | 50–150 kg/h | 200–600 kg/h | 800–2000 kg/h |
| Power | 7.5–15 kW | 22–45 kW | 55–90 kW |
| Screw type | Single screw | Twin screw | Twin screw |
| Pellet size | 0.5–8 mm | 1–12 mm | 1–15 mm |
| Voltage | 220V / 380V | 380V | 380V / custom |
A full production line typically includes:
Hammer mill – grinds raw materials into fine powder
Mixer – blends ingredients evenly
Fish feed extruder – produces floating or sinking pellets
Dryer – removes moisture from pellets
Oil sprayer – adds fat or oil for nutrition
Cooler – brings pellets to room temperature
Packing scale – bags the final product

Floating or sinking? Floating requires a more advanced extruder with steam conditioning.
Capacity – small farm: 50–200 kg/h; commercial: 500–2000 kg/h.
Pellet size – fry need 0.5–1mm; adult fish need 4–10mm.
Power source – electric motor (standard) or diesel engine (remote areas).
Budget – small models start around $3,000–5,000; commercial lines $15,000–50,000+.
Clean the die and screw after each use to prevent blockage
Check cutter blades regularly – sharp blades make uniform pellets
Lubricate gearbox every 500 hours of operation
Use only dry, clean ingredients (moisture 20–30% for wet extrusion)
Save money – produce your own feed at 30–50% lower cost than buying commercial feed
Control quality – choose exactly what goes into your fish feed
Reduce waste – floating pellets let you see how much fish eat
Fresh feed – produce on demand, no long storage
A fish feed pellet machine turns local ingredients into high-value aquafeed. Whether you run a small farm, a feed mill, or a commercial aquaculture operation, there is a model that fits your needs. Simple to operate, built to last.