I have a small seedling starter heating mat and the same brand thermostat (Hydrofarm Jump Start). They claim to be the only UL-certified brand, and after reading all the Amazon comments about reptile heating cables bursting into flame, I went with that (though I do have a reptile heating cable too).
I keep it under 1/2 to 2/3 of the mini-hearth.
And yes, I founded Pogonomyrmex subnits in mini-hearths. I got two polygynous sets from Sleepy, one earlier in the year, the other later. iirc the queens had a roughly 30% mortality rate (contrast to my Veromessor pergandei mortality rate of 50% or my horrendous M. mexicanus 90% ... it could be I just suck). At this point the remaining 5 queens (3 and 2) colonies are doing well. The 2 queen colony is still being heated because they were so far behind. The 3 queen colony is getting low heat over winter because the mini-hearth is getting crowded AND not only that but they made the glass so disgusting I can't see inside. I've ordered a Fallen Fortress for the dirty Pogonomyrmex - supposed to be good for visibility since they can't climb on ceiling glass and soil it.
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Ants_Dakota and Swirlysnowflake like this
Formiculture Journals::
Veromessor pergandei, andrei; Novomessor cockerelli
Camponotus fragilis; also separate journal: Camponotus sansabeanus (inactive), vicinus, laevigatus/quercicola
Liometopum occidentale; Prenolepis imparis; Myrmecocystus mexicanus (inactive)
Pogonomyrmex subnitidus and californicus (inactive)
Tetramorium sp.
Termites: Zootermopsis angusticollis
Isopods: A. gestroi, granulatum, kluugi, maculatum, vulgare; C. murina; P. hoffmannseggi, P. haasi, P. ornatus; V. parvus
Spoods: Phidippus sp.