Gnats

[Brenna7503]

Gnat infestation in cage, I’m kinda worried, will they hurt the crabs? How do I get rid of them, I already tried deep cleaning the cage, but they came back.

[Spocktopus]

Gnats and fruit flies are generally harmless to your crabs, thankfully! I've had issues with them with some of my other inverts for a long time, and while they're annoying they won't hurt your crabs. One bug you should keep a watchful eye for are mites, which can be seen crawling on your crab and can be harmful for their health. There's a few way to mitigate the gnat problem, however. Changing food regularly, cleaning substrate/toys/decor to remove gnats and their young, and spraying down your tank with salt water are all great ways to combat the problem if it's minor. But since that didn't work, I'd recommend baking your substrate or replacing it entirely, along with disinfecting all of your decor. Good luck