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Aquasearch - California Type Trays and Troughs
This hatching devise consist of individual serial trays with a tight fit inside a shallow trough. Trays are perforated in the bottom and the top of the one side turning away from the water inlet. In combination with a tight fit to the sides and the bottom of the trough and correct dimensions, this design result in an upwelling waterflow.
A lot of examples are available in the Market, and it is recommended to use thoroughly tested versions only. The relation between bottom mesh area, egg density (counter pressure) and outlet mesh area does matter, and cannot be ignored e.g., by simply upscaling the size of the trays or changing the length to width dimensions. Most versions in the market will require min. 8 – 10 l / min waterflow and min. 8 mg / l oxygen saturation with an even distributed 3 – 5 egg thickness layers of eyed eggs for hatching.