Re: Diatom Filters and Algae Blooms

Subject: diatom filters & green water

> Will a diatom filter clear up suspended algae? (i.e. will a Vort
> filter (or equivalent) filter out an algae bloom ("green water")
> How big are those critters (the algae, that is)? Diatom filters 
> supposed to catch things down to 1 micron.

My experience has been that a diatom filter will clear the water 
during an algae bloom, but that it doesn't "cure" the problem.  
The bloom tends to come back in a couple of days.  I suspect that 
you don't get every single algae cell by diatoming, and it only 
takes one!<g>

Karen Randall
Aquatic Gardeners Assoc.
Boston, MA