Hi! As every autumn, i separate beetles in 3 tanks (I havent a "freezer tank" yet...): one i let with me, they are warm and reproductive. The other 2 are at my parents basement, warmer than the street. They feed them with dog food (beetles are not their duty and they disgust them). The fact is the bigges tank has this little bugs. Are they mites? All the larvae are dead. https://imgur.com/uJHXdVq https://imgur.com/a/m1c5E50I know this tank must be totally clean and desinfected and the beetles are sentenced to die... Dont know if the videos work... so i let this pic, but as the bugs are so small, maybe you dont notice them.