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Eheim filter media

To: Aquatic-Plants at actwin_com
Subject: Eheim filter media
From: Kekilat <zon at mad_scientist.com>
Date: Sat, 13 Feb 1999 20:44:01 +0800
References: <199902090848.DAA20892 at acme_actwin.com>

The Eheim EHFIMECH and EHFISUBSTRAT looks like they can last forever.

It is necessary to change any of these media? When to change?

rgds.

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