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Re: Filtering "green water"

Bob wrote:
> I went to the better LFS today looking for a diatom filter, like the
> Vortex, for polishing my water.  I still have a little residual "green
> algae, plus I'd like to be able to filter out suspended clay particles if
> make a mess with my tinkering.  LFS didn't have any diatom filters, but
> said the HOT Magnum would do almost as good and was a whole lot easier to
> I looked at one, and it had instruction for using diatomite powder with
> micron filter if you really wanted to.
> Is this filter adequate for water polishing (especially with just the
> filter without the diatoms)?  My current filter is a little too small for
> tank; a 100 gph "AquaTech 5-15" (kind of like a biowheel "mini" without
> wheel) in a 20H tank with too many fish and lots of plants and 2.2W/gal
> fluorescent lights.  If I were to use the hot magnum in this size tank,
> it turn the tank into a maelstrom?  Is it posible to set it up so it
> disturb the surface water too much and lose all my CO2?

The HOT Magnum is not really a diatomaceous earth filter, even if you can
use some of this powder in one of its operations.  The "Vortex" is an real
dialtomaceous earth filter and, still better, is the "System 1"
diatomaceous filter from Aquarium Products.  The latter is very simple to
use and will polish a "green water" aquarium in four hours or less!  If not
available from your LFS, most (if not all) of the mail order houses sell
this filter.  In four hours, you won't have to worry about losing CO2 for
that time!

Merrill Cohen