Well.. First of all that is an unexpected variable in all clutches, and an non-controllable.
The easiest way to ensure the best rate of fertility is to only get your eggs from a source you have had a high fertility rate from.
The group that is in there currently came from Grambys farm which did a test hatch before she sent me her eggs. She had 90% fertile eggs, so mine were the same. Out of 22 set only 20 were fertile.
The point of the vs is to compare the mechnical attributes to the incubator, with the progress of the known fertile eggs. Since I candle on day 5 which is early I know, but I do this to seperate the potiential infertile eggs at that time. I pull and do an eggtopsy on day 7 to verify if it was fertile. Tonights observation was that for some reason the
Brinsea's air sac's were just a little larger than the Hova's.
I will repeat this test and compare to this test with the eggs coming from the same location. So after the 1588 VS.. you will see once again the 1602n V Octagon 20 Eco V2.0
I also chart the temps taken 3 times daily.. I need to take a pic.. Right now I have 5 Thermometers in the hova, and 4 in the
Brinsea.. Looks like a science experiment gone bad. I'm not looking at the temp, just the variance.. For example when the Hova gets really low on water, it indicated that by changing the internal temp on 4 of the 5 thermometers by .8 degrees on all of them, not just one. Once water was reintroduced into the pan, the temps (and after it became stable) the temps fell by .8.. Very interesting.. I also have 2 thermometers out side each bator for room temp variance readings.