It is recommended to replace the water cartridge approximately once a year as it becomes less absorbent with each refill.
Dimensions: Length: 3” Width: 2.5” Height: 1”
I cannot provide you a review because according to the tracking info, the USPS is still awaiting to receive the item I ordered from you on April 13th...
Ultra Replacement Water Cartridge
So far, so good. Yet to be determined how long these will last. Great concept, they maintain humidity really well.
Replaced cartrige but the alarm system still go off after a day or so. Not sure what's causing this!!