Low kh and ph - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 04-09-2006, 12:05 AM Thread Starter
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Low kh and ph

My kh tested at 1* I never even saw the starting color and my gh was 7*. This seems very low to me. My ph was the lowest color on the chart 6.2 but I suspect it could be lower than that even. I have diy co2 and I have driftwood in my tank. My plants are growing great and my fish are eating well and seem happy. Is my tank in any danger?
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post #2 of 6 (permalink) Old 04-09-2006, 12:11 AM
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You should get the kH up to around 3 degrees. That will also raise the pH. Do the change slowly.

I have the info in my Guide on how much to use.
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post #3 of 6 (permalink) Old 04-09-2006, 12:25 AM Thread Starter
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Since your guide says 1tsp in 13ga of water raises kh by 4* and you said to do the change slowly, would it be safe to add 2tsps of baking soda to my 55ga every time I add my macros (3x per week), test and then adjust accordingly?
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post #4 of 6 (permalink) Old 04-09-2006, 01:14 AM
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Add about 1/4 tsp at a time, and test your kH and pH after each addition. Wait 30 min - 60 min after adding before you test. Don't raise the pH more than 0.5 units each day. In my experience, 1/4 tsp will raise your pH about 0.3 units and your kH by 0.2 - 0.5. Two tsp of baking soda will raise your pH almost 2 full units! Don't do that!

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post #5 of 6 (permalink) Old 04-09-2006, 01:25 AM Thread Starter
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Woh, good thing i didn't do that. How long should that last it my tank? Should i gradually increase the amount to get to my desired 3* kh?
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post #6 of 6 (permalink) Old 04-09-2006, 02:32 AM
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If you use pressurized CO2 and shut it off at night, the PH will go up as much as one unit by morning. Many of us do that, with no problems. So, I doubt the need to go slowly with raising KH/PH. I do it every water change, and do it by dumping in dissolved baking soda. I probably wouldn't try to raise KH by more than a couple of degrees at a time, but that is hardly going slowly.

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