Hey, thanks for reminding me where I got that scar on my hand: Changing the jar on a broken Diatom filter. Man, that was a long time ago; my first state industrial insurance claim in the tropical fish business. I've still got one around someplace. Hagen sells a filter attachment ("Quickfilter") that goes on a powerhead pump and it filters down pretty fine. Has a replaceable element. Seems to work pretty well. You could probably use one to devise your own submersible diatom filter even. Steev ------------------ 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/