I have almost that exact humi, except I got the 50 ct. with the lock and key.(I was skeptical of CC but they have some great stuff!) The round disk they sent me has served me well for almost 6 months now! I seasoned my humi at the beginning of January and it has maintained a constant 72% humidity the entire time, with minor dips of course in which I added a little more distilled water and it raised back up. Beads are great because you can physically see when you need to add more distilled water. I would probably recommend upgrading the hygrometer first, it did well in the salt test but I still have a tough time trusting it. I will def upgrade it to an electronic when I get the money!