Would an increase/decrease in KH and GH hurt my fish? - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 01-12-2014, 01:28 AM Thread Starter
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Would an increase/decrease in KH and GH hurt my fish?

Would it?
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post #2 of 6 (permalink) Old 01-12-2014, 02:02 AM
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Problem if I am thinking correctly is it will also change your PH
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post #3 of 6 (permalink) Old 01-12-2014, 03:13 AM
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Depends on how severe but yes, it can kill them.


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post #4 of 6 (permalink) Old 01-12-2014, 03:20 AM
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Most freshwater fish will adapt to a wide range of water parameters if the change is made gradually. General hardness and carbonate hardness changes can cause changes in your pH, and if this happens rapidly it can have negative effects on your fish.
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post #5 of 6 (permalink) Old 01-12-2014, 03:53 AM
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KH will give you some pH stability along with the pH increase. I increased my kH for stability and my system has benefited I believe. Key is gradual increase with monitoring both pH and kH.

Plants like some GH since it's mainly magnesium and calcium.

A big part of this discussion is, why are you wanting to make changes?

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post #6 of 6 (permalink) Old 01-12-2014, 04:36 AM Thread Starter
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reason i ask is my tap water is super soft, i have a 29 gallon and i have to buffer my water for water changes.. so i just set up my 10 gallon and need to do a waterchange, but i dont want to pre mix my stuff in the 18 gal bucket because i will have too much water left over..

so now im not sure what to do... maybe just pre mix the stuff in a 5 gal bucket but then the kh/gh will be slightly off since i have to guess, probably not by a lot but it will be slightly off

starting to think that i need the gh and kh to be exactly the same, since i want to transfer the fish from the 29g to the 10g so i can sell and get rid of them

Last edited by honest; 01-12-2014 at 05:09 AM. Reason: edit
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