anyone ever used a diatom filter?

[fencer]

I still have mine. It is an old model but still works.But never used in salt(BTW it is for sale cheap ) The startup is kinda messy but after a few passes the filter starts gaining efficency and you get very clear water. I would do it in the sump first or a pail to get it to prime so it does not exhuast diatom powder all over the tank