Fish egg hatchery incubator

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.

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.

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.

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. The same conical, upwelling principle is used in an artemia tank for hatching brine shrimp as live feed — ask us if you need a dedicated artemia incubator alongside your fish egg jars.

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.

Yes — a tilapia egg incubator is one of the most common applications. Tilapia eggs are mouthbrooded in nature, so in a hatchery setting they are stripped from brooding females and placed in an upwelling incubator jar where gentle tumbling prevents smothering and fungal infection. A tilapia egg tumbler (another name for the upwelling McDonald jar) holds 20,000–60,000 eggs at 2–4 L/min flow per jar, and multiple jars are run in a rack with a shared sedimentation tank. SIGMA's fish egg incubator tumbler for sale covers tilapia, catfish, sturgeon, trout and salmon in the same platform.

Beyond the incubator jar, a complete hatchery setup uses a fish hatchery net for separating newly hatched fry from the incubation vessel, fine-mesh nursery nets for early-stage grow-out tanks, and a sedimentation / filter tank to keep recirculating water clean. SIGMA can supply the full set — incubator jars, jar racks, sedimentation tanks and matched hatchery nets — as one package.