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Re: [APD] RE: computer fans

Good Point Chris,
Adequate ventilation is essencial. i wish Icould seal the top of the
aquarium a I get about a 1-2 gl loss daily , that means that everyday I need
to add all the crudy water we get, and in turn mov concentrated heavy
metals, nitrites, chlorine, PO4 and on and on.. Reverse osmosis isn't a true
cure as it strips too much from the water , thus you  have to add some
minerals back in. It's a see-saw of sorts. So my only true option (until I
can get a DE filter or get one of you to send me a diagram of the layout of
the DE filters) is to do WC @ 25-30% per week.
BTW, Chris do you have a brother from Canada by the name of Rob?
Used to work prototyping with him. Was fun.Please contact me privately about
some computer ideas I can bounce off ya, Mark B.
----- Original Message ----- 
From: "Christopher Ferrell" <ferrell_chris at hotmail_com>
To: <aquatic-plants at actwin_com>
Sent: Friday, March 26, 2004 1:53 PM
Subject: [APD] RE: computer fans

> Just thought I'd add something.  If you have a fan that's too loud, then
> can put in a small resistor in series with the fan to help slow it down.
> pushed less air, but it won't be as noisy.  A good place to start is
> 50 ohms.  100 ohms will slow most fans at 12V down too much to really be
> effective IMHO.
> You can also either run two fans in series or run a single fan off a
> less than 12V, say, like 6V, for similar noise damping effects.
> Chris
> "Engineering is the art of molding materials we do not wholly understand
> into shapes we cannot precisely analyze so as to withstand forces we
> really predict in such a way that the community at large has no reason to
> suspect the extent of our ignorance."
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