If your water's alkalinity is 0, what degree KH would you raise it to? - The Planted Tank Forum
View Poll Results: If your water's alkalinity is 0, what degree KH would you raise it to?
1 dKH 0 0%
2 dKH 1 4.76%
3 dKH 4 19.05%
4 dKH 8 38.10%
5 dKH 5 23.81%
6 dKH 0 0%
7 dKH 1 4.76%
8 dKH 2 9.52%
9 dKH 0 0%
10 or more dKH 0 0%
Voters: 21. You may not vote on this poll

 
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post #1 of 6 (permalink) Old 01-01-2006, 12:09 PM Thread Starter
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Question If your water's alkalinity is 0, what degree KH would you raise it to?

Same as with the GH thread...

I do realize that different plant species have different preferences, so there is a pretty big factor of which species you want to keep. But assume you have a tank with lots of different species, perhaps without any of the extremely "fussy" species (like Tonina). Or perhaps with. Vote anyways.
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post #2 of 6 (permalink) Old 01-01-2006, 01:52 PM
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3 is both still soft and gives plenty of room for a little KH depletion over time without the fear of a pH crash.

If I get time I will post the graph I made that shows the how fast pH drops after an incremental drop of KH less than 2d. This is in a 3ppm co2 environment.

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post #3 of 6 (permalink) Old 01-01-2006, 02:10 PM
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I voted for 8 because I like to have PH of around neutral, but a little less. So 8 degrees of KH and a PH of 6.8 would give about 40 ppm of CO2. Those numbers would be pretty stable. I just like it that way because it can support a broad range of fish.
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post #4 of 6 (permalink) Old 01-03-2006, 05:48 AM
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I'll take 5 dKH because its easier to get 30plus ppm CO2 that way.





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post #5 of 6 (permalink) Old 01-03-2006, 04:24 PM
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4dkH, just to have a little extra buffering over 3dKh...assuming CO2 injection is planned.
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post #6 of 6 (permalink) Old 01-04-2006, 03:34 AM
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KH Preference

I am raising my near zero KH now. I have been trying 4 degrees, but that gives me a PH that is in a hard to read area of the KH kit color chart. So, today I raised it to 8, and it is much easier to more accurately tell how much CO2 I am injecting.

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