Great purchase. Fast shipping as always. Better than micropore and ez felt. Saw their ecosphere is now coming with these and a temperature controller, so I bought these to get up my ecosphere up to date, bought the heat controller from amazon. Anyone that bought the ecosphere before they came with these needs to buy these. I recommend buying 2 of the six packs so you have a total of 4 on each tier.

Love these. They work great. Wonderful service.

only time will tell

Works great. Thank you

Midwest has been invaluable in getting my home mycolab up and running. These disks are already working on my monotub to bring in filtered air.