Below is a copy of the mite products from jtresser.com. As I read it I understand that tedion is as it states an internal solution but I could be wrong. Seems a bit expensive unless it does it job well.
MITE RELATED PRODUCTS
MITEBEGONE SOUTION $ 9.00 (4OZ ) INTERNAL KILLING
SOLUTION FOR CONTROL AND ELIMINATION OF MITES. EXCLUSIVELY MANUFACTURED FOR THE DROSOPHILA CO.. HIGHLY RECOMMENDED . INSTRUCTIONS INCL.
TEDION SOLUTION $ 15.00 ( 2 OZ ) ***
AN INTERNAL KILLING SOLUTION FOR THE CONTROL OF MITES AND OTHER INFESTATIONS. VERY EFFECTIVE
MITE POWDER* $ 5.00 *** EXTERNAL POWDER FOR PREVENTING MITES FROM MIGRATING FROM ONE CULTURE TO ANOTHER.
I use it with great success. In fact, I really haven't had a mite issue since using it. But you dont mis it the culture. You soak paper towels in it and put the pieces in new cultures. Jerry sends directions when you buy it.