i have had isopods for around four months now, and have had my current enclosure for 2-3 months. they recently started breeding, and i saw a bunch of the little babies. I went on a trip for around ten days, and left the isopods in the care of a friend while i was away. (to make sure it was damp enough, feed them once or twice) they did a pretty good job, they all seemed to be doing fine. but i noticed there were less of the babies than when i had left, and around a day or two later i opened the lid, and there was fruit flies. i heard that these can be a big problem for isopod enclosures as the flies can breed and such, and was wondering how to get rid of them? I couldn't find any videos or solutions that would work, and i don't want to have to start over again. here's a picture of the tank from before i left. not much has changed, other than there's a few flies now.