On the Mini, what color, if any, is the slime?
How long have you been growing that seed kit?
Where do you get your water from? (Tap, filtered, distilled, etc...)
Have you ever rinsed and refilled these gardens?
Is there a particular odor associated with the Mini that is not present in your other AeroGardens? (OK, I'm reaching here, but I really don't know what's causing the slime.)
Slime is white and opaque.
Between 3 and 4 weeks.
Using 3-stage RO water.
Only topping up and adding nutes. Same for the healthy Mini3 and 3 Pro 200's (all healthy).
Somewhat musky smell like old mushrooms...very faint. Does not smell like water and nutes like the others.
Also, there is a small amount of black spore / mold at the top (near plate surface) of the weakest pod. Everything is underneath in the bowl. Some of the "slime" is free-floating and you can see globs of it inside the plastic cages of the pods. It is heaviest on the healthiest of the three pods.
Hope that helps identify it and come up with a solution besides chucking the plants, sanitizing the Mini3 and starting over. I also want to make sure my healthy systems don't get contaminated.