I think the Biodude sells isopods and other cleanup crew. I've had pretty good luck using superworms as cleaner crew in my colony. I have a combination of worms and beetles in there and they just do their thing. I've noticed the bodies and frass buildup is much lower than before I started using them. They have lasted for well over a year without any interference from me.
Isopods and in conjunction springtails you really won't get the full effect out of them unless you have them in a bioactive dubia roaches will eat them so without them having a place that they can hide you're basically just feeding your roaches in the bio dude is a very good source for springtails and isopods he takes very good care of them you don't have to take a risk of importing mites to your colony.