HCA: Hermit Crab Association

I just found some larvas into my crabitat... I know that I have to clean up everything but how they got there?

Fly larvae? You can just scoop the surface of the substrate in the area they are and scrub out the food dish. Good luck!

Thank you this is what I did but I'm just afraid that my crabs got infected :/ Is there a way to know it?

If it is fly larvae, they won't harm the crabs.