Upwelling gentle tumbling
Eggs stay suspended in oxygen-rich flow, so they neither smother nor fungus over — maximising hatch rate.
Fish egg hatchery incubator
Where your harvest begins — an upwelling fish egg incubator (McDonald jar / hatching cone) that gently tumbles eggs in a continuous, oxygen-rich flow, screening out fry so they cannot escape, to push hatch rates and fry survival as high as the species allows.
- Jar capacity~8 L · 20,000–60,000 eggs
- Flow2–4 L/min per jar
- MaterialFood-grade PP
- SpeciesTrout · salmon · sturgeon · catfish · tilapia
ISO 9001 CE OEM / ODM
15+ years in aquaculture engineering · Trusted by Japfa Group, Japan Nissui & Tropo Farms · Shipped worldwide in one container
Product Description
Egg incubator manufactured in acrylic glass, with a hemispherical bottom.
200 mm diameter. 500 mm in height. 12 liters (30,000 eggs)
Pipes in PVC, with valve type “spigot” 25 mm output for connecting hose of extraction of eggs.
Underside protected with rubber gasket
The standard version is supplied with 500 Micron mesh (ask for other measures)
Advantage:
Hatchery and fingerling rearing with complete RAS based on the requirements of the local water
conditions. Water is permanently fed into the system from a local well. The system can be switched to RAS in case the water conditions are not optimal. The system was installed to
produce fish for the local market.
we have developed this system has, bio-filter+ UV, then there will be better to keep not too much
water exchange, then the 3.0PH heater can keep running in 24hours
Video of Product
Application
Specifications
Models & configuration
Capacities follow the industry McDonald-jar standard and vary by species and egg size — final specifications are confirmed by SIGMA's production line per project.
| Model | Capacity | Typical use | Core configuration |
|---|---|---|---|
| SIGMA-HJ-8 | 20,000–60,000 eggs (up to ~100,000 small trout eggs) | ||
| SIGMA-HJ-6set | 120,000–360,000 eggs | ||
| SIGMA-HC-M | Custom by cone diameter | ||
| SIGMA-HC-RAS | Sized per hatchery |
| Working principle | Upwelling flow — water rises through the egg mass, keeping eggs suspended and gently tumbling |
|---|---|
| Material | Food-grade PP — leak-proof, corrosion- and crack-resistant, high strength |
| Fry retention | Built-in screen retains newly hatched fry; cone bottom simplifies fry collection and discharge |
| Water type | Freshwater / saltwater |
| Species | Trout, salmon, sturgeon, catfish, tilapia and many others |
| System pairing | Sedimentation/filter tank, biofilter, UV sterilizer and heater for a full RAS hatchery |
| Options | Aeration, custom cone diameters, PLC integration |
System composition
Fry screen and cone-bottom discharge
Newly hatched fry cannot escape, and the conical bottom makes collection fast and gentle.
Food-grade PP build
Leak-proof, corrosion- and crack-resistant, with simple inlet/outlet connections into a RAS or flow-through hatchery.
Plug-and-play jar racks
Multi-jar manifolds with a sedimentation/filter tank are delivered as one working set.
Upgradeable to a full RAS hatchery
Add biofilter, UV and heating for temperature-stable, biosecure incubation.
One platform, many species
The same incubator serves trout, salmon, sturgeon, catfish and tilapia.
Optional aeration
Supplementary aeration supports dissolved oxygen and water movement during incubation.
Application
- Fish-egg incubation in hatcheries and seed farms — the start of the fry production chain
- Sturgeon fingerling breeding programmes
- Cold-water trout and salmon incubation with temperature control
- Volume hatching of warm-water species such as tilapia and catfish
- Integrated RAS hatchery and fry nursery setups
FAQ
Frequently asked questions
How does a fish egg incubator work?
It works on upwelling flow — water enters at the bottom and rises through the egg mass, keeping the eggs suspended and gently tumbling so they don’t smother or fungus over.
How does the incubator keep the fry from escaping?
A built-in screen retains the newly hatched fry while letting clean water flow through, and the large cone-shaped bottom makes it easy to collect and discharge fry.
How many eggs does one incubator jar hold?
Depending on species and egg size, a single jar holds roughly 20,000–60,000 eggs (up to ~100,000 for small trout eggs) on a flow of about 2–4 L/min.
What species can the incubator be used for?
The same platform serves trout, salmon, sturgeon, catfish, tilapia and many others, and can be built into a full RAS hatchery with a biofilter, UV sterilizer and heater.
What is the incubator made of?
Built from food-grade PP, the units are leak-proof, corrosion- and crack-resistant, with simple inlet/outlet connections that drop straight into a RAS or flow-through hatchery.
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View details →Request a tailored quote
Tell us your species, target density and site — our engineers size the system and reply within one business day.
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