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Re pumice

To: Aquatic-Plants at actwin_com
Subject: Re pumice
From: Alfred Heng <alheng at pacific_net.sg>
Date: Thu, 08 Jul 1999 07:18:34 +0800

Date: Wed, 7 Jul 1999 08:40:56 EDT 
From: IDMiamiBob at aol_com 
Subject: Re: Pumce

The pumice in question is in the gravel form. It is a sort of natural 
sintered glass, and tends to float until it gets wet. It is neutral to the 
water, affecting neither pH, GH, KH, nor conductivity.
Snip
it would be great as a bio-filter medium. I suspect it 
would out-perform all those plastic balls by about a 5:1 ratio.
Bob

Thanks for the response.  Now for the next question, where can I get some,
what is it sold as, what quantities?

I am currently trying out what the nurseries call "burnt soil" as a
substrate.  I have 1 1/2 " of it at the bottom of the tank covered with 1"
of 2-3 mm gravel.  It is a dark reddish brown in colour .  Will keep you
all posted on the outcome of this experiment

Alfred

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