My 6 new colos are in 2 gal pots in 5-1-1 mix and growing OK but i know they'd never survive letting them go dormant.
Sort of the same question...basement under lights or east window?
thanks,
Will

Be careful with chem for mites tho, u Must use a miticide or you are wasting your time, and exposure to nasty stuff...
If you have mites again use a no pest strip, you can order them or get em at lowes, walmart etc. they work best in small areas and I dont like being around them. THEY KILL MITES. Full extermination. You can also make a nice spray with vinegar lemon juice epsom salt and and just a bit of baking powder and dawn soap. So satisfying to watch em melt, but u have to wash it off your plants.

Lomodor:

I wonder where in zone 6 you live. Theres many opportunities for naturalizing elephant ears in zone 6, colo. "pink china" is hardy here with no protection... Im in KY our winters arent the best for overwintering tropicals outdoors but its certainly not impossible, and quite rewarding when successful.
I also like to mention that your storage method may not be the best for everyone. Honestly it just screams infestation to me. Clearly it works great for you if you are owerwintering thai giants that way. They are finicky. Bringing non-sterile material from outside, wetting it and containerizing it...Ewww...Sorry to pick on ya, but I would not feel comfortable packin my babies away that way.
I used to store all my bulbs in large wooden gun shipping crates, gun stores get em from time to time and usually trash em. You can get em for free, and all sizes. I would first dig or unpot all the bulbs, clean them best I could and wash them, I always left the babys on if I could. Id let em dry a few hours layed on the shady porch or wagons. Id fill the bottom with some dry peat moss, lay the cleaned bulbs close but not touhing, and add more dry peat every layer, a few inches. Until its full. I kept them in a cold basement, It worked great for decent sized bulbs, smaller ones needed to not be cleaned and packed with some moist soil.
Since then Ive become considerably lazier, and just dig and repot the ones in the ground, and just let them and the potted ones go dry and they stop growing. It turns out that works fine too, Now its all I do! Its so much easier.
Once spring rolls around just add water and away they go. any I need to divide, are fully dormant when i repot and that part actually helps me and the plant too i think.

Hope this helps :D

Im happy to experiment and lose a few bulbs but im just gettin my numbers back up enough to try.

Theres a few C.tea cups, a monster C.Violet stem, and a couple good sized A.portoras planted in a super sheltered spot, i bet it stays 2 full zones warmer, I planted em around a foot deep.
I also have a C.pink china from brians botanicals that he swore would make it with no help. Hes kinda on his own under a bush sittin right under the dirt. We will see...