DIY CO2 and white stuff in aquarium

To: "'AquaLink - Fresh Water Fish and Plants'" <fresh at aqualink_com>, "'Fish and Aquaria'" <AQUARIUM at EMUVM1_CC.EMORY.EDU>, "'Aquatic Plants'" <aquatic-plants at actwin_com>
Subject: DIY CO2 and white stuff in aquarium
From: "Clayton L. Workman" <cworkman at quapaw_astate.edu>
Date: Thu, 23 May 1996 01:52:01 -0500

I may get yelled at a little since this issue has already been addressed, but tonight, I noticed a white filmy substance on my airstone and in my reaction chamber of my DIY CO2 system.

Is this substance harmful to my fish/plants?  What is it?  

TIA

Clayton

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