Another DIY 4*dkh Solution - Page 2
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Old 06-03-2012, 04:07 PM   #16
Cardinal's Keeper
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Haha! Yes very true, just trying to limit the variables which could result in the method not producing predictable results.

The only place I "guarantee" predictable results is in my own garage "lab", lol
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Old 06-24-2012, 08:34 PM   #17
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nice job, i have a question, is the solution that came with the drop checker is 4dKH solution?? and u suggesting us to make this solution so if the solution that came with the drop checker is done using we can use this diy solution........... or do we need to add this solution with the one that came in the package im new in drop checker, bought one last week but dont know how to use :P hope to get some suggestion
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Old 06-25-2012, 01:59 AM   #18
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I'm not sure what comes with the drop checker. Never bought one. But this is to make a solution that is 4dKH. Then we need to add the "PH indicator solution" Which comes with API test kits. That turns the solution blue. When exposed to the CO2 coming off the water, the blue will slowly turn yellow if CO2 is low or green if near the 30PPM we consider correct. There are several items here that will explain far better but it may take some searching to find them.

Any directions with the drop checker? Seems they should tell you something like that!!!
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Old 06-25-2012, 02:20 AM   #19
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Blue < Green < Yellow
Less co2 ---- More co2
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Old 10-18-2012, 01:38 AM   #20
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so how do you use the kh to test the diy 4dkh mix?
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Old 10-18-2012, 05:44 PM   #21
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You can use twice as much water in the KH test tube and each drop of the reagent equals 0.5 degrees of KH, making it easier to determine that the KH is 4 and not 3.5 or 4.5 dKH. Of course this means assuming that the test kit reads accurately, and if it is more than a year or so since it was manufactured, it might not do so.
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Old 09-11-2013, 01:25 PM   #22
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Cool beings I gotta try this.
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Old 09-12-2013, 09:27 PM   #23
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Wow, by saving the splits, you could have 24 cups of the stuff and only discard 4 cups. That is a bunch of 4dkh! And less waste.
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Old 11-07-2013, 03:11 PM   #24
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This thread is amazing and I think is well worth a sticky
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Old 04-18-2014, 03:45 PM   #25
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Thank you very much for this. Made a batch today and worked perfectly. Have some extra if people want to buy.

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Old 04-23-2014, 08:12 AM   #26
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what should chineese TDS meter read when im at 4dKH solution using baking soda and DI water?
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Old 04-25-2014, 01:00 AM   #27
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I have no idea but I can't think why a Chinese TDS meter would be any different than any other TDS meter. There all made in China anyway..
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Old 04-25-2014, 06:13 AM   #28
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Quote:
Originally Posted by Cardinal's Keeper View Post
I have no idea but I can't think why a Chinese TDS meter would be any different than any other TDS meter. There all made in China anyway..
should it be 70ppm then?
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