02-27-2007, 02:35 AM
Join Date: Jul 2006
Something to add about any diatom filter--it's not a good idea to let it sit for hours unused and then use it again without cleaning it out. The bacteria caught in it can go into anerobic activity and start converting nitrates (not too bad of stuff) into nitrites very, very bad stuff).
Had I seen the Magnum at that low a price I might have considered it when I bought my System One diatom filter. It looks a bit more complicated to use (not much), but not nearly as complicated as the Vortex, and it looks like it can be used for regular filtration, too, something the System One isn't designed to do. That price link at Drs. Foster & Smith showed it sells for a decent price, too!