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Re: [APD] Storing large amounts of RO water & reconditioning RO water

GH is a measure fo calcium and magnesium in the water. KH is a measure of hte carbonates in the water. So, for example, if yu add calcium carbonate (CaCO2), you boost GH and KH.
 
Make the hardness whatever you want. Tehn based on KH and pH you can calculate the amount of CO2 (easier to look it up on the table). The amount of GH or KH won't affect the amount of CO2 and needn't be a consideration -- unless for some wild reason you think you need some very specific pH.
 
Have plants, have fun,
 
sh
 
* * * * * * * * * * * 
The Northeast Council of Aquarium Societies (NEC) celebrates its 50th year of service at its 31st annual convention, April 7-9, 2006 -- including *An Evening with Aquarium Legends*.
 
Read the speaker list, then download the registration form, and get set to join the fun at what promises to be the year's biggest tropical fish convention.
 
http://northeastcouncil.org/html/
 
And while you're there, attend the AGA's annual meeting Friday afternoon (2-4pm). This year's speaker is Claus Christensen, Tropica's Managing Director. 


----- Original Message ----
From: Steve B <habubak at yahoo_com>
To: aquatic plants digest <aquatic-plants at actwin_com>
Sent: Friday, February 24, 2006 3:42:40 PM
Subject: Re: [APD] Storing large amounts of RO water & reconditioning RO water


Jerry,
   
  OK, I understand now, so I need a hardness test kit.  Then I determine what hardness I want the water to be at based on the level of CO2 I want dissolved in the water, and does a 2:1 mixture until I achieve that hardness, and use the CO2 table.
   
  What type of hardness does this produce?  KH or GH?  It makes a difference in test kits, I've read that somewhere...
   
  Stop me if I'm wrong  ;-)
   
  Thanks!
   
  Cheers & Gig'Em,
  Steve

Jerry Baker <jerry at bakerweb_biz> wrote:
  Steve B wrote:
> Thanks Jerry, that was my next question! I was either gonna google it or ask you where you can find that stuff...
> A follow up question for Jerry:
> You say 2 parts CaCO3 and 1 part MgCO3... per what? Gallon? I'm confused regarding your terminology for dosing.
> 
> Thanks for any clarification!

Per whatever. If it was a lake you might dose two tons of calcium 
carbonate and one ton of magnesium carbonate. If it was a cell-sized 
tank it might be two picogram of calcium carbonate and 1 picogram 
magnesium carbonate. It depends on the level you want to achieve. I just 
mixed the powder in a 2:1 ratio and added some of that mix until I got 
to the hardness I wanted.

-- 
Jerry Baker
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