KH and Baking soda? - The Planted Tank Forum
 
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post #1 of 13 (permalink) Old 12-29-2013, 05:29 PM Thread Starter
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KH and Baking soda?

My water is 2KH and I would like to raise to 5. I red Arm and Hammer baking soda would do that. Do I only need to treat the water for water change and not the tank, and will it hold the KH value without adding anymore baking soda to the tank in between water changes? thanks
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post #2 of 13 (permalink) Old 12-29-2013, 06:09 PM
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It will also effect your PH. unless your PH is already high, (i.e. around 8), then it will raise PH. no idea about KH.
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post #3 of 13 (permalink) Old 12-29-2013, 06:17 PM
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Yes you only need to treat the new water going into the tank after a change. And it should hold kh levels unless you have some plants or other things absorbing it.
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post #4 of 13 (permalink) Old 12-29-2013, 06:39 PM Thread Starter
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I'll do some testing how much it raises the ph and GH after I reach my target of 5KH.
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post #5 of 13 (permalink) Old 12-29-2013, 06:54 PM
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I think a KH of 2 is fine. I personally wouldn't bother altering it. However, if you would like to try, 1/4 tsp. in 10g will raise KH about 1.3 degrees.
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post #6 of 13 (permalink) Old 12-29-2013, 07:11 PM
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Why do you want your KH that high?

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post #7 of 13 (permalink) Old 12-29-2013, 09:18 PM Thread Starter
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My RCS tank is probably fine but I would like to improve their living conditons. Right now: KH 4, GH 10, PH 7.6 at night and 7.0 during the day with Co2 but the TDS is 400 ppm. I'm doing 50/50 RO/tap with these readings. I'm going to lower the TDS to 200 ppm with 75/25 RO/tap to achieve this but all values come down with it. I'm going to use baking soda to raise the values where they were except the TDS will be at 200ppm. If I don't raise the KH, the PH might come down too low at 6.6. I want it at 7.0, is that makes sense?

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post #8 of 13 (permalink) Old 12-29-2013, 10:01 PM
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Do you know what your water parameters are for just tap water? You might not need RO if the tap is reasonable.

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post #9 of 13 (permalink) Old 12-29-2013, 11:34 PM Thread Starter
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My tap is very hard:
PH 8.0
KH 11
KH 23
TDS 500 ppm
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post #10 of 13 (permalink) Old 12-30-2013, 03:42 PM
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I would personally just stick with RO/Tap mixture rather than trying to adjust KH. Cherry shrimp are very hardy and tolerate a wide parameter range. It's more important to maintain stable conditions rather than changing them often in an attempt to create specific parameters.
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post #11 of 13 (permalink) Old 12-30-2013, 04:08 PM Thread Starter
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Well with the 65/35 RO/tap this is what I got.
KH 2
GH 7
Ph 7.4 and with Co2 6.8
TDS 230
Although I'm doind EI I'm not doing 50% weekly water change, instead I do 25% twice a week so I won't be so much change at one time for the shrimps. If I only add 1/4 tsp of baking soda to a 4g water change to add 1-1/2kh, that shouldnt be so bad, unless my listed values above are good.
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post #12 of 13 (permalink) Old 12-30-2013, 04:30 PM
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I think those parameters are fine for RCS. The only thing that could stand improvement would be the TDS. Maybe try more RO to get it below 200. The KH is certainly high enough.
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post #13 of 13 (permalink) Old 12-30-2013, 04:37 PM Thread Starter
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Quote:
Originally Posted by Zorfox View Post
I think those parameters are fine for RCS. The only thing that could stand improvement would be the TDS. Maybe try more RO to get it below 200. The KH is certainly high enough.
Yeah I can adjust the TDS easy enough with more RO, but it will lower my KH also. I think I will add little baking soda to target 4kh and shoot for little under 200 TDS, just do it little at time every water change.
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