Discount Crane Demineralization Filter Cartridge for Crane Frog, Cow, Pig

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My advice is to keep the original cap in case you decide this filter is not for you.

It managed to stop mineral deposits from building up further on the side of the resevoir, but the water gained a musty smell after a 15 gallons/three weeks of use. I sanitize with chlorinated water bi-weekly.

It was especially apparent in warm heated rooms. The risk of bacterial growth outweighs the benefits of the filter for me and I do not recommend this product.

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I bought the Crane Penguin humidifier about 2 months ago. The filter arrived about a week later. My experience applies to people using HARD TAP WATER. So far I've found that, although the filter helped with keeping the humidifier a bit cleaner (I clean it once a week with diluted bleach for the tank and vinegar for the base), it only seemed to work to reduce white dust (from hard water minerals) for just over a month, using the humidifier at a low or medium setting. I'm considering using distilled water instead it might work out cheaper than having to replace the filter every couple of months. I would definitely advise to keep the original cap for the tank and try the humidifier with and without filter.

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I got a lot of these Crane humidifiers. We have a lot of minerals in our water, so I got these filters. Some of the humidifiers made too much noise to use in a bedroom. They are extremely cute, though, and inexpensive.

I got white dust everywhere even with the filters, even after also using water run through another charcoal filter. If you are serious about these humidifiers, you need to use distilled water. Then you won't need these filters.

About the white dust, I mean literally everywhere, inside the DVD player for instance. I have quit using all of the Crane humidifiers and put them away. I was really sad about this, because they are so cute. They did raise the humidity about 10%. We live in the desert, it is very dry in the winter.

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This filter ruined my humidifier which had worked perfectly without it. Here is what happened to me. The humidifier, with filter in place, had been running for a couple of days when I noticed an odd smell upon entering the room. I determined it was coming from the humidifier, so I unplugged it and removed the water tank to take a look. To my shock, the bottom on the humidifier was filled with the amber colored pellets that once were inside the filter. The pellets filled up the area that should have been filled with water. The reservoir had water in it and the unit continued to run, but was overheating because the water wasn't able to flow. The heat damaged (melted) the nebulizer black ring so that the water just leaks right through the bottom now. I am glad that I found out before it caused a fire. Crane customer service has not responded to my email either.

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I bought this to use with the Duck Humidifier and it worked perfectly. However I got the Penguin a week later and I think the spring release (to trickle more water) does not work with the Penguin... I think it's not screwing on properly (in spite of trying a thousand times to do so). So if you got the penguin like a lot of folks, be aware this might be a waste of money.

Update: I contacted Crane and the service rep said this was probably a defect with the Penguin Humidifier, and to fill out the warranty card and send the severed power cord (gruesome!) to them and they will mail a replacement.

Update: I mailed them the cord and they, at no charge, shipped me a new Penguin, and it's working perfectly this winter with the filters. I guess the threading on some of the Penguins is off.