Lasius don't like to move. if you try to make them move they won't. Like lazy ant said a little above room temperture is good. Provide foraging areas once they hit 30~ workers.
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lazyant and AntGirl like this
What i am keeping Brachymyrmex patagonicus 1 worker x5 tetramorium immigrans 10 workers x2 lasius crypticus 5 workers Pheidole californica 6 queens150~ workers 10-30 majors, Formica argentea 10~ W
What I've kept crematogaster sp pheidole californica camponotus vicinus high elev, dumetorum,laevigatus, prenolepis imparis, pogonomyrmex californicus and subnitidus and californicus, veromessor andrei, camponotus sayi, hypoponera opacior ,Liometopum occidentale solnopsis molesta group, solenopsis xyloni.