From my experience with the hovabators, they work great but since they are used for chicken eggs they are usually set high and need to run and be adjusted for at least a couple of days so your eggs don't get fried. They incubator doesn't need a lot of airflow or circulation, that tends to dry out the eggs. I use vermiculite to incubate and in the humid boxes. Perilite can be used to incubate but I wouldn't use t in the humid hide. Both of these (and sphagnum moss) can be found at homedepot and lowes.
As far as feritlity goes, it really depends on the gecko. I've had females that have never laid an infertile egg, some that only laid one or two from their first clutch and some that lay infertile eggs in their last clutch of the season. If you think they might be infertile give them the benefit of the doubt and keep them in the incubator till they turn moldy or brown.
Good Luck with your first clutch! I hope this helps.
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Emily
leos:
1.2 SHTCT (Gus, Baby & Gizmo)
.1 Tangerine (Ziggy)
1.1 Patternless (Zander & Daisy)
.3 Hypo High Yellow (Zoe, Dini, & Munch)
1. Normal (Nelson)
.1 ???? (Ice)
everything else:
.1 sulcata tort (Turtle)
1.1 ferrets (Oliver and Delilah)
1. budgie (Max)
0.0.1 Ring neck Parakeet (Kiwi)
1.1 German Shepards (Jake and Abigail)
Too Many Fish!
The Reptile Place
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