Regulate hydrometry to promote hatching

The problem of eggs that do not hatch, despite their fertilization, met by breeders gave me the idea of ​​this subject.
The importance of the moisture content during the development of the egg and hatching in our breeding rooms pushes us to find solutions to regulate it, especially during dry periods.

Previously I used an ultrasonic humidifier :

Humidificateur
Adjustable and ideal, humidifier and ionizer at a time. However, after a year and a half of use, he is now making his own by having untimely stops. So I opted for a much cheaper solution: Saturation ceramic (about 5 euros per unit in DIY stores) :

Saturateur ceramic

For my part I monitor daily hydrometry and set myself a minimum of 55% moisture in the air.

Indicateur hydrometre et temperatue

Below this moisture content, I put the saturators on the oil-filled radiator (which dries less air than the electric radiators type radiant or commonly called "Toaster").
The principle of evaporation caused by the heat of the radiator works well, but it takes about a day to see the effects.

Saturateur sur radiateur copyright

If I see that the humidity does not rise enough, I cut the air extractor or regulates it. The air extractor is connected to an extractor speed controller socket.

Variateur d intensite

By taking these precautions for the duration of brooding, I have no problem hatching.
I avoid the solution of the bath, which could for me to "heat" and see them destroy their eggs to undertake another. Except possibly the day before the hatching date, either by proposing a bath with the couple or by spraying the eggs.

The combination of heat and humidity gives a more favorable terrain for the development of bacteria .. And therefore diseases. Above 70-75%: I remove the saturators and ventilate the room, if necessary by means of the extractor of air to lower the humidity rate.

Hydrometry Humidity Humidifier Saturator Radiator Air Extractor Inverter Bath Spray