Fog Incubation

The history of attempts to perfect mist incubation goes well back into hatchery history in the Pacific North West as well as across the nation. Many have attempted but given up for a variety of reasons. The last five years has seen a major leap forward in early incubation technology with the invention of the “Chilled Fog” incubator developed by Redd Zone.

Advantages of Moist Air Incubation

Fog Incubation requires and incredibly small amount of water. No prophylactic treatment for fungus is necessary if eggs are sterilized and water hardened before loading.

  • Each family can be isolated
  • Lateral transfer of pathogens is eliminated
  • Infinite temperature ranges are easily achieve, allowing one to accelerate or decelerate development.
  • Otolith marking is virtually effortless and free

On-going testing

Redd Zone is pioneering research on a different approach to early incubation of salmon and trout eggs. In cooperation with several fish hatcheries in the Pacific Northwest, Colorado and Idaho, Redd Zone is testing both salmon and trout in its new chilled fog incubators. Our approach is to generate moisture through sonication (ultrasonic) vibration, to produce a one micron fog that bathes the fertilized eggs. This allows for the transfer of oxygen and carbon dioxide across the cell membranes.

Without high pressure pumps and other complexities, we have a product that is quite simple and easy to operate yet miserly in its water consumption. At one gallon of water per day the system can even operate on domestic water supply as each incubator comes with a carbon filter good for one thousand gallons of usage. That’s several incubation seasons! Cost of filter replacement is less than $10. Chilling is accomplished by the use of Peltier Chip Technology, which is solid state, very stable and also miserly in power consumption.

We have two size units available, a single door with twelve trays and a double door with twice that. Each tray is comparable to two Marisource vertical flow trays commonly used in hatcheries around the world. Using the same foot print as the vertical tray stack, our double door unit will incubate the equivalent of 48 trays, three times that of a Marisource double stack.

Units operate on 24V DC current and can be modified for 115V AC or 230V AC source power.

Please contact Tod or Roger for pricing and availability!
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Noble Creek STEP Hatchery

The Noble Creek Hatchery is a volunteer operated STEP hatchery located on a tributary of the Coos Bay estuary complex. It is one of three such facilities that feed hatchery reared pre-smolts into the estuary where they grow until time to migrate to the ocean.

Limited and dirty water supply

Noble Creek is a small stream often with flows of less than twenty gpm. During incubation time water is not only limited, when abundant due to freshets, it is very turbid with high levels of suspended inorganic solids. Its incubation system was a carry over from one hundred year old technology, i.e. wooden troughs. The space and water utilization were beyond what was needed for quality fry production and systems were prone to the production of fry that were smaller than appropriate.

Water filtration and Deep Matrix Incubation

Redd Zone proposed the installation of a water filtration system that would remove the majority of the suspended solids then installation of deep matrix incubators that would 1) dramatically reduce the foot print for incubation, 2) use less water and 3) produce a heavier swim-up fry that would perform better than what the group was accustomed to.

Bottom-line: Much Higher Returns

A automatic back-flushing sand filter was installed and four deep matrix Redd Zone incubators, each capable of hatching two hundred thousand Chinook eggs. The system has been used for four seasons now and the first three-year-old Chinook returned in 2010. The adult returns outpaced the other production STEP hatchery feeding Coos Bay by more than one thousand adults, mostly threes, even though it released several hundred thousand fewer fry. The staff and volunteers credit the incubation system that produced heavier, more robust fry that performed exceptionally well until release.

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