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CO2 automation

At 03:48 PM 5/26/00 -0400, Colin Gorton wrote:
>I've recently been installing an automatic CO2 system using a Tunze pH
>controller. The price of the pH controller was very reasonable but I was
>alarmed to see the price of the valve.

This brings up a question that has been bothering me for quite a while.   I 
know there are a bunch of VERY advanced planted tank folk who do not do pH 
regulation by solenoid.  Are there any who do????   If you do but want to 
keep it to yourself, I will respect your desire for privacy if you write me 
off-list.    Thanks.    Dave

Dave Gomberg, San Francisco            mailto:gomberg at wcf_com
Jobe's Fern and Palm Spikes FREE        http://www.wcf.com/pam