Question, what Model of the Brinsea 20 do you recommend? Out of all three...
I only can give you input on the base model Octagon 20ECO Manual Turn Incubator. I am sure the more expensive models are fantastic but I have limited funds for my hobby so I got the no-frills model. I have experience with styro forced air incubators and a home-made cooler for reference.
When I received the model and plugged it in, I calibrated the temperature to see how the internal thermometer related to others. At one point I had 7 thermometers in there and came to the conclusion the reference thermo in the unit was low by about 4 degrees. I contacted
Brinsea and they replaced the thermometer. It was easy to replace.
The unit maintains a much steadier temp than the other incubators I have used before, and the temperature appears to be more uniform throughout the interior space. I was worried I would have trouble with the turning but it was very easy. The bars were slightly tricky to use to find the correct spacing so the eggs of various sizes fit. I ended up essentially sorting the eggs so that the eggs of similar diameter shared one rail slot. I used toilet paper rolls cut in thirds as spacers for the lines where I needed to so the eggs all remained upright.
The incubator did need to have the water well topped off every 3-4 days. I had 2 internal thermometers and when the temp started creeping up I knew it was time to add water. Water loss (calculated by weight loss) was more uniform in this batch than in styro incubations and seemed appropriate (have not done all the calculations yet as they just went into lockdown last night).
So far this batch of shipped eggs plus reference home ones (I placed 4 from my own flock as a comparison) and 5/12 shipped are in lockdown and 4/4 home eggs made it this far. 3/4 of the home eggs pipped over night (a day early). I ran the temps at about 99.8 on average (varied 99.5-100 on 2 thermos I placed) so I am not sure why they are pipping a day early.
So far I am super-happy with this purchase and with
Brinsea's customer service. I wish the chamber was a little larger. I really wouldn't want more than a dozen eggs to make it to lockdown or I think they would be crowded. I would love a little more head room for the chicks and it would make it a little easier to view them. I think the viewing is better in this unit than in the styros with the dual overhead windows, though.