Is it possible to have high KH and a calcium deficiency? - The Planted Tank Forum
 
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post #1 of 8 (permalink) Old 04-29-2006, 06:20 AM Thread Starter
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Is it possible to have high KH and a calcium deficiency?

I live in SE Michigan and am on well water. My KH is 14. My plants show distorted growth and I suspect magnesium or calcium deficiency. Is it possible to have such a high KH and still have a calcium deficiency?

I just bought some Kent Liquid Calcium. Any idea how many mL to add to a 125g tank?
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post #2 of 8 (permalink) Old 04-29-2006, 12:54 PM
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Yes it is. kH is bicarbonates. gH is calcium and magnesium.
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post #3 of 8 (permalink) Old 04-29-2006, 01:53 PM
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High KH and no GH....sounds like the work of a water softener.

Do you have one?

Compare water from an outside connection to an inside one. Also, the cold-water tap in your kitchen would likely not be "softened".

If it turns out not to be the result of a softener, and your water is naturally lacking GH, consider a product like Kent RO Right. It adds GH without KH, and is much less expensive than liquid supplements (albeit, not as cheap as mixing up your own stuff).

Ted


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post #4 of 8 (permalink) Old 04-29-2006, 02:07 PM
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If you have a water softener then try using a connection that is not softened. The gH is replaced with sodium or in some cases potassium. Adding the gH back in will result in water that has a very high level of TDS.
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post #5 of 8 (permalink) Old 04-29-2006, 03:05 PM
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Quote:
Originally Posted by tankfreak
I live in SE Michigan and am on well water. My KH is 14. My plants show distorted growth and I suspect magnesium or calcium deficiency. Is it possible to have such a high KH and still have a calcium deficiency?

I just bought some Kent Liquid Calcium. Any idea how many mL to add to a 125g tank?
What's your GH?

Regards,
Barry
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post #6 of 8 (permalink) Old 04-30-2006, 04:04 AM Thread Starter
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We do have a water softener. Would this remove enough calcium and/or magnesium to cause deficiency?

Would I be better off using water from an unsoftened tap?

Unfortunately my test kits are 4 years old and I cant trust their readings. I need to get new ones and test softened taps and unsoftened taps. Then I will report back.

thanks for the help!
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post #7 of 8 (permalink) Old 04-30-2006, 05:05 AM
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My tap comes out at 20KH 20GH. I made the mistake of using softened water when I first set up one of my tanks. The plants yellowed and died, and algae flourished. When I tested the tank water, it read 20KH 0GH. When I did a 50% water change with "unsoftened" tap (20KH 20GH), the resulting mix read 20KH 5GH. My water softener was removing the Ca/Mg with some Na+ to spare.

Ted


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post #8 of 8 (permalink) Old 04-30-2006, 05:05 AM
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Water from an untreated tap should work much better. Most water softeners remove Ca and Mg and replace it with Na which isn't plant friendly. If your water is too hard, mixing it with some RO/DI would work better. But try first using unsoftened water, at least the Ca deficiency will be gone.


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