There are a lot of anti-mite products for beekeeping, most of them should work for ants as well.
Something that worked well for some people on the Antkeeping Discord Chat is offering a few grains of rice in the outworld (preferrably where the ants like to hang out/walk along). If those mites are grain/food mites they will love the rice and jump off the ants to feed on it. A wet sponge might do the same for some species of mites.
Two easy methods you could try if all else fails (both are immensly stressfull for the ants though):
- Brush the mites off with a flat painting brush
- Drop the ants into a bowl filled with water (ants can survive under water for quite a while as ants go into a sort-of hibernation state when they fall into water, the mites might quickly jump ship though)
Edited by Serafine, December 16 2018 - 3:08 PM.