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Re: Bringing pH down

On Thu, 19 Nov 1998, Morten Karlsen wrote:
> Anyway, I have this old book - which holds formulas & stuff, related to chemistry.
> It's WAY to long since I learned this stuff - so I cannot advise on this topic - but a thought occured when seeing the list of acids...
> These look interesting:
> H2CO3 and HNO3 / HNO2.

H2CO3 is carbonic acid.  Carbonic acid doesn't actually exist as a pure 
compound.  It the same thing as carbon dioxide (CO2) and water (H2O).  
You dose "H2CO3" by adding CO2.  It's a great way to lower pH.

HNO3 is nitric acid.  It's a strong acid and works just like sulfuric 
or hydrochloric acid when it comes to lowering pH.  The NO3- part is 
nitrate and that will fertilize your plants and algae.

HNO2 is nitrous acid.  It's a strong acid like nitric acid, but the NO2- 
part is nitrite -- it's toxic.  Nitrobacter and other nitratifying 
bacteria will convert it to nitrate in due time, but it might kill a few 
things before they do.

CO2 for H2CO3 can be purchased bottled or produced by yeast.  You might be
able to get nitric acid at a pharmacy.  When I was a child back during the
industrial revolution I could buy it with the requirement (since it's a
dangerous chemical) that I sign for it.  I don't know that nitrous acid is
readily available. 

Roger Miller