I bought mine used locally but in great condition. It has vision 70qt tubs. Mine came with 3 inch heat tape in it which was recessed in the bottom of each shelf. I took the 3 inch out and replaced it with 12 inch tape to raise the ambient temperature since my room stays cold. There is a good gradient from the hot side to the cold side. Humidity is controlled with holes that you can drill or melt into the tubs. I have six holes on the front and six holes in the back of the tubs and humidity stays constant at 55% with paper towels. It will be higher and harder to control if you use substrate. Overall I am happy with the rack. It rolls easily and it’s built well.
Sent from my iPhone using Tapatalk