[APD] Re: CO2 levels

[wcwirla at verizon_net]

This pH is for my 20 gal which is on tank CO2.  The morning pH is 
occasionally as low as 6.8 though it is usually closer to 7.0; by the 
end of the day it is up to 7.2.  I could moderate this with a solenoid 
on a timer to shut the CO2 off at night, but I've never had any 
problems with either fish or snails in over two years of running things 
this way.  (The SAE in this tank is over 9 years old!)  My DIY CO2 
tanks tend to be around 7.2 at 11 deg kH.  The tank with the higher CO2 
levels seems to always have the least amount of algae.

WMC

On Mar 25, 2005, at 9:02 AM, aquatic-plants-request at actwin_com wrote:

> 30 ppm is borderline healthy.
> ppm C02 = 3 * dKH * 10^(7 - pH)
>
> Though, I must admit that once I woke up to find my CO2 content at
> 133ppm. The snails were heading for high ground but the fish appeared 
> to
> be OK. Odd. I thought they ought to be dead. They didn't seem to be the
> slightest bit sluggish either.

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