Leemone Humidifier Cleaner 20 Pack ，Demineralization Cleaning Ball，Works in All humidifiers and Fish Tanks，Purifies Water, Prevents Hard Water Build-Up，Eliminates White Dust and Odor

I recently picked up the Leemone Humidifier Cleaning Fish, and I’m honestly impressed. Such a simple idea, but it works really well. I dropped it into my humidifier tank and noticed a difference within days. The water stayed cleaner, and I didn’t see that usual buildup starting to form as quickly. It’s completely hassle-free. No weird smell, no residue, and no extra steps added to my routine. Just put it in and let it do its thing. I also like that it helps extend the time between deep cleanings, which saves me time. If you use a humidifier regularly and want an easy way to keep it fresher and cleaner, this is a great little add-on. Definitely worth it.

I put these in the humidifier tank because the instructions say I should. I don't know if they do any good, really, but they're slimy when I toss them. However, I've not had scale build up on the tank walls. The filters catch & hold the mineral scale, as expected, & they have to get changed out, as well. I change these monthly or so, while using the humidifier through the winter.

These would Always get stuck in the center where the lid goes. I didn’t quite like these. Not sure if they really did anything either.

Been using them for about six months now and don’t really see any difference between when I use them and when I don’t. Price isn’t bad and maybe cut down on the white mist.

We have hard water at home. And I'm talking REALLY hard water. VERY SUPER MEGA ULTRA HIGH levels of calcium carbonate. We installed a water softener for the house but it doesn't get all of it so our water is still slightly hard even after that. We were still getting carbonate dust blown ALL OVER THE HOUSE from the humidifiers. And the humidifiers kept getting clogged up with the carbonate scale, too. The wicks were turning into ROCKS of chalky carbonate. SO NASTY. SO we got these to compensate for that. IF your water is "slightly hard" these work GREAT at preventing scale buildup and that white dust from happening. IF your water is "very hard" though, you MUST install a water softener FIRST. One fish per tank is all it takes. My humidifier has 2 tanks each 1.7 Gallons and one fish is all it takes for each one. But eventually the chemical inside the fish will run out, so you will have to replace the fish every 15 - 40 days, depending how bad your "hard water" problem is. Also, even though this item is called a "cleaning fish" it doesn't actually clean anything. It just removes calcium carbonate scale, and has a mild anti-algae / anti-bacterial chemical. So you will still have to wipe down your humidifier parts every 2 months or so, and change the wicks about every month or so.