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Old 11-17-2012, 09:49 PM   #16
tetra73
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Originally Posted by Darkblade48 View Post
I was a bit confused as to your user name at first, but that's another story.

In any case, you cannot measure pH and kH to get CO2 reliably, as there are other factors in aquarium water that will affect the kH.

The best way to check CO2 levels is to use a drop checker with a 4 dkH reference solution.

Hhehehehe....Tom turned newbie and talking about CO2 chart. For the OP, the CO2 drop checker should be somewhat yellowish by mid day. Completely yellow by the end of the light cycle. Well, you talked about grams of fert. Do you know how many ppm of each fert you are dosing? How do you dissolve your CO2 given that you have a 100g tank? Is a big tank.
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Old 11-20-2012, 09:24 AM   #17
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Originally Posted by Richardblack View Post
yeah it was blue .. and it came in the JBL box...

I am going to use the DC forum to help with this cos i feel something is not right.
The blue drops is the reagent, did it also come with 4dkh reference solution?

You need to use the reference liquid and not tank water otherwise it wont be accurate.
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Old 11-20-2012, 09:41 AM   #18
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yeah it was blue .. and it came in the JBL box...

I am going to use the DC forum to help with this cos i feel something is not right.
As mentioned, the blue reagent is likely the bromothymol blue.

Did you add anything else to the drop checker? As mentioned by killswitch, you cannot use aquarium water (or tap water, or distilled water, etc) for accurate readings.
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Old 11-23-2012, 04:09 PM   #19
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The blue drops is the reagent, did it also come with 4dkh reference solution?

You need to use the reference liquid and not tank water otherwise it wont be accurate.
I used the liquid that came with the JBL kit.. it looks 'ready to go'. To be sure I have cleaned the DC and added another 35 drops (like it says in the manual)
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Old 11-23-2012, 04:13 PM   #20
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How do you dissolve your CO2 given that you have a 100g tank? Is a big tank.
I use Aquamedic 1000 CO2 reactor.

I have newly installed Fluval FX5 filter but kept my old canister filter to put water though my UV and Reactor.
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