First Need Water Purifier Upgrade

This past year, General Ecology, makers of the First Need Water Purifier system , changed their water purifier cartridges. The old cartridge model was called a First Need Deluxe (left) and the new one is called the First Need XL (right, in photo.) As far as I can tell, the Deluxe cartridge has been pulled from distribution. They’re impossible to find and if you do order one, the new XL model arrives instead. The good news is that the new XL cartridge is completely compatible with the old pump