Product review (1 stars): We had a terrible experience with a filter that was only 2 weeks ...
Other brands of humidifier filters that we have looked at have a micro bacterial  core that keep algae from forming. Skuttle filters do not. We had a terrible experience with a Skuttle filter that was only 2 weeks old. There was a horrible odor coming from our vents when air was going through the filter. We had to replace the filter and it seems to be working fine now. Although, there is a smell to the Skuttle filter itself before using which is an odd smell. We could not find a filter other than Skuttle to fit the Skuttle brand humidifier installed by our furnace company.