![]() ![]() ![]() ![]() Some people position the incubators with their outlet high above the level of the tank that catches the water overflowing from the jar. As the fry hatch and absorb their yolk sac, they start swimming freely and many of them wash/swim out of the jar with the exiting water. The trick with both systems is to provide sufficient flow to keep the eggs suspended without causing too much velocity that results in the eggs, or yolk sac fry, washing out of the top of the incubator. The eggs rise a bit but due to their mass they remain in the lower portion of the jar. This constant motion is what the eggs require to remain healthy.Īn adaptation on this design involves the water entering the lower side of the jar at an angle, causing the water to spin inside the incubator, carrying the eggs in constant motion. As the water rises the jar widens and the velocity reduces, allowing the eggs to again fall down towards the floor of the incubator. Due to the domed shaped of the floor, water velocity is high as the water enters the jar, causing the eggs, which are heavier than water and tend to sink, to be held in suspension. They function by water entering via the vertical pipe in the middle of the incubator which opens near the floor of the incubator. These incubators are very expensive, look great and work fairly well. Most 1st world tilapia farms and government hatcheries across the world utilise the McDonald type of incubator which is moulded from polyethylene. The more eggs you have the better most incubators function the real trick is to get them to operate effectively with small batches of eggs. Both systems work, and each can be very efficient. Two basic designs exist those where water is directed downwards to the domed bottom of a jar and keeps the eggs in suspension as it rises, and those where the water enters the container at an angle, causing the eggs to flow in a circular motion. Over the years we have tested the effectiveness of many different types of incubators to determine which is the most cost effective solution. Tilapia eggs are unique in that they need to be kept in motion in order to remain alive. ![]()
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