Drop checker... - The Planted Tank Forum
 
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post #1 of 4 (permalink) Old 08-18-2014, 06:11 PM Thread Starter
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Drop checker...

I'm still trying to dial in my CO2 and have a general question...
(I know that drop checkers are certainly not entirely reliable BUT)

If my drop checker is green can it be assumed that I have ample CO2 for my plants?

Yes - I use 4dkh solution in my checker and yes it is blue when out of the water. I don't want to gas my fish and am not noticing obvious behavior of suffering from too much CO2...

On the same note --- Is it possible that the classic dark-green color doesn't cut it for some tanks?


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post #2 of 4 (permalink) Old 08-18-2014, 07:13 PM
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just because your drop checker is "green" doesn't mean it is exactly any particular number. If you want it to be more accurate you can use two drop checkers with different dKH set so that if BOTH are green for instance you are at or near target. For instance, if you use this calculator, you can see that if both are green (with the options I selected) the co2 is at 25-35, versus if you were only using one drop checker, being green could mean anywhere between 14 and 35, so using two drop checkers allows you to get a tighter window.

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post #3 of 4 (permalink) Old 08-18-2014, 07:36 PM
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Quote:
Originally Posted by AHGoodwin View Post
just because your drop checker is "green" doesn't mean it is exactly any particular number. If you want it to be more accurate you can use two drop checkers with different dKH set so that if BOTH are green for instance you are at or near target. For instance, if you use this calculator, you can see that if both are green (with the options I selected) the co2 is at 25-35, versus if you were only using one drop checker, being green could mean anywhere between 14 and 35, so using two drop checkers allows you to get a tighter window.
+1, and here's the link http://dropcheck.petalphile.com.

Dark green is a little low for 4dkh I belive. You want to aim more for lime green.
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post #4 of 4 (permalink) Old 08-18-2014, 07:55 PM Thread Starter
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Good to know - I think I'm within the right range (maybe a little high). So far my algae is very much under control so I'll try to turn it down a tad and keep the fish happy. It's pretty yellow right now...

Thanks for the link as well.


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