Join Date: Jan 2004
Location: Ontario, Canada
I've never used a diatom filter.
In reading about them I see references to not running them constantly and some people saying they use them for a few hours 2-3 times per week.
If a HOT Magnum , charged with DE, is used periodically, can it be left on the tank and just turned on?
Should it be removed and drained between uses?
Is there a problem with stagnant water remaining in the filter between uses?