Is 4dkh solution for drop checker - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 12-22-2010, 05:28 AM Thread Starter
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Is 4dkh solution for drop checker

Is there a reason why I can't just use my tap water if it is 4dkh?
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post #2 of 6 (permalink) Old 12-22-2010, 05:55 AM
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If your tap water is 4dkh you can just use it straight.

That said, before you count on it being 4dkh, I would take a sample of the tap in a large cup and leave it out for 24 hours and then test it again. There is a relationship between the amount of CO2 in the water and the KH value and the amount of CO2 in the water might be more or less than normal right out of the tap. 24 hours should be plenty enough time for the CO2 level to stabilize and that will give you a good idea if your water is actually 4dkh.

You'll also want to check the tap water parameters a few times a year if you live somewhere where the temperature changes a lot over the seasons, especially if you have well water or water that originates from wells.
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post #3 of 6 (permalink) Old 12-22-2010, 02:02 PM
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Check the pH too just in case. It should be around 7. If not, It's OK too. You just have to adjust your colors like dark green is 30ppm CO2 instead of bright green.

Use the kH/pH/CO2 chart as a reference.


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post #4 of 6 (permalink) Old 12-22-2010, 06:28 PM Thread Starter
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ok, thanks guys
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post #5 of 6 (permalink) Old 12-22-2010, 07:01 PM
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If there are other species of anions in your tap water that affect kH, then it may not be a good idea to use it in a drop checker...

Anthony


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post #6 of 6 (permalink) Old 12-22-2010, 07:34 PM
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It won't work for most aquarium water. The drop checker is only necessary because tank water almost always contains substances that affect the pH other than CO2 and carbonates. Using tank water in the drop checker just makes it indicate the pH of the tank water. It is very easy to make good enough 4 dKH water - see https://www.plantedtank.net/forums/fe...tml#post801218 If you have a large grocery story near, they will almost always have distilled water at about a dollar per gallon. And, almost all kitchen cabinets have a box of baking soda, bicarbonate of soda. No scale is needed, just measuring cups and measuring spoons.

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