Re: [APD] DIY CO2 on the cheap

["BRiaN Forsythe" <megasycophant at gmail_com>]

Have you thought about DIY yeast + sugar?  I did this way back and it
was skippy, regardless of the horror stories.  I never bothered with
anything more than standard baker's yeast, though folks without much
KH in their water may need to add some baking soda.

On Thu, May 1, 2008 at 9:42 AM, Stuart Halliday <stuart at mytriops_com> wrote:
> I've a small 20litre tank with plants and I opted for the CO2 via a small
>  aerosol type canister that with a squirt of CO2 fills a underwater plastic
>  cylinder with a CO2 soluble membrane at the top.
>
>  It's made by tetra - http://mytriops.com/mypics/tetra_co2.jpg
>
>  But the refill cans are kind of expensive and I have to order them onlineso
>  I bought some Sera CO2 tablets and made a bottle of water and CO2 tubing
>  that I can drop a tablet in and the gas fills up the cylinder and lasts for
>  2-3 days.
>
>  Then I discovered Denture tablets!
>
>  Cost of the CO2 can - £6 (US$11.80)
>
>  Cost of Sera CO2 tablets - £4 (US$7.87)
>
>  Cost of my denture tube? - 30p (US 59 cents) :-))
>
>  Next I'm thinking of using Sodium bicarbonate and cream of TarTar (potassium
>  hydrogen tartrate) or vinegar.
>
>  A colleague thinks that will do as well and may be cheaper still.
>  Seemingly I need to mix sodium bicarbonate and a light acid in water to
>  produce the CO2.
>
>  It's fun discovering these alternatives. :-))
>
>  --
>  Stuart Halliday
>  http://mytriops.com/
>  200 Million years in the making...
>
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