I got this with one of the cages I bought. On the one hand, it did need to be re-filled every few days. On the other hand, despite many attempts to fix the problem (including running it outside the enclosure as a trial), my enclosure appears not to be level, so it leaks and then leaks out of the cage. I would imagine it wouldn't need re-filing if it wasn't leaking out. I don't know that Zoo-med can help since it really depends on the ambient humidity. I can tell you that when it starts to need re-filling it will be noisy so you'll know.