Quote:
Originally Posted by Tom Barr
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You will add more CO2 via the needle valve if the pH solution inside the checker becomes yellow and less if it becomes blue, the solution is green when you have enough CO2.
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Regards,
Tom Barr
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That is backwards: yellow means low pH or too much CO2 in the water, and blue means high pH or too little CO2 in the water. So, if the drop checker fluid is blue, add more CO2 by adjusting the needle valve. If it is yellow, reduce the CO2 by adjusting the needle valve. A bubble counter is very good when doing this, because you can see how much effect adjusting the needle valve is having.