I've used the Diatom XL model for years but agree it's a pain to set up and to clean. The Magnum HOT model comes with a micron cartridge which can be used with diatoms, does a good job, it very easy to set up and to clean. IMO a much better product. dave ------------------ To unsubscribe from this list, please send mail to majordomo@thekrib.com with "Unsubscribe gsas-member" in the body of the message. Archives of this list can be found at http://lists.thekrib.com/gsas-member/