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Re: [APD] CO2 drop checker
Jerry,
If you can see a clear difference between yellow, orange, and red,
this can be used with a different indicator solution. Phenol Red
would work fine for this purpose, and ebay now has someone selling
Phenol Red for less than $20 for ten lifetimes supply. This would
require setting the KH of the water in the bulb to 20 degrees. Then
orange would indicate 30 ppm, yellow orange would be about 65 ppm,
and red orange would be about 15 ppm. I haven't tried it, of course,
but theoretically it would work, if the differences in color were
easy enough to see. I haven't found any other indicator that would
work, that isn't yellow/green/blue. Why don't you try this??
Vaughn H.
On Oct 16, 2006, at 1:57 PM, Jerry Baker wrote:
>
>
> Just curious to hear from anyone who actually has this. Is the green
> color a dark green, or a bright green (i.e., is there a noticeable
> contrast difference)? I ask because the difference between bright
> green
> and yellow is non-existent for about 10% of us males. Thanks.
>
> --
> Jerry Baker
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