We have the fungus gnats in our office and unfortunately they do not come to apple cider vinegar...we have tried. However they seems to have a knack for ending up in my hot tea.
Several folks in the office have brought in houseplants, which introduced the gnats. A lot of houseplants from nurseries or big box stores will come with these, an unwanted bonus.If you have moist soil, or substrate in this case, they thrive in it. For houseplants, you can treat with some chemicals but they aren’t safe for animals. I’ve read that you can add an indoor mulch layer on top of the potting soil, which gives a dry layer to keep the gnats from the moist soil, but don’t know if that would work in an enclosure...particularly if you have a snake that likes to burrow.
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