Quote:
Originally Posted by Naja002
Ok, so what keeps the reference solution from collecting C02 and changing color? I assume its the "buffer" part of the reference solution......... 
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It looks like the reference solution chamber, bottom one, has a plug in it to keep it from getting co2 enriched tank water into it. You take out the plug, fill it with the solution and put the plug back in.
I don't have one, that's just how it looks from the pictures.
John