High pH and kh, acclimating fish - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 01-26-2005, 07:14 PM Thread Starter
 
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Smile High pH and kh, acclimating fish

My pH is 8.4 in all three of my tanks. It starts out at 8.0 from the faucet. The only problem I run into is fish getting ich when I first get them. Not always, I think it depends on how long the LFS has had the fish in their store. My kh is 16degrees. Anyone have any suggestion on getting the ph lower, or maybe I shouldn't worry about it. I have heard different views on this. I am unable to keep really delicate fish though.

Also, I have heard of several different methods on acclimating fish. Anyone have any suggestions that work well for them?

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post #2 of 5 (permalink) Old 01-26-2005, 07:27 PM
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Let the water sit overnight and then measure it the next day. If you're still getting a pH value of 8.0 and then it increases to 8.4, then there's something in your tank that's buffering and raising your values. Also, are you running CO2 on this tank (drives pH values down, depending on the hardness)?

As for keeping fish at those pH values, it'll take a long acclimation period (depends on what kind of fish, how long the LFS had them, and what the water parameters of the store was).

Drip method for me during acclimation. Measure pH value inside the bag and compare it with pH value inside the tank. Start dripping water from tank to bucket until pH values match (length of time and drip rates depend on the differences in pH values, but I've done 16 hour drips before).

Eric


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post #3 of 5 (permalink) Old 01-27-2005, 12:43 PM Thread Starter
 
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Okey, I'll try leaving some water out over night and see what happens. My kH is 16degrees(not sure what that is in ppms). I have a CO2 bubble counter injector, and this is the second month with the co2(it's a Hagen Plant Grow Natural System). I have that in the 29gallon. I was thinking about adding another one. According to my last calculation the co2 was around 3(very low).

I get confused about the hardness, is that the kH or gH? I have read somewhere that the kH is what keeps your pH from jumping around. If you have a high kH does that you'll have a hard time lowering pH.
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post #4 of 5 (permalink) Old 01-27-2005, 11:55 PM
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Quote:
Originally Posted by capplema
I get confused about the hardness, is that the kH or gH? I have read somewhere that the kH is what keeps your pH from jumping around. If you have a high kH does that you'll have a hard time lowering pH.

gH is your total hardnes, the Kh is the buffering capcity of the water and is usually a percentage of the gH (if you dont mess around with water params).

High kH will mean that it has a high buffering capacity and therefore tend to have a stable pH. If yours is rising (pH) then yes I would think there is somthing in your aquarium that is increasing the buffering capacity.


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post #5 of 5 (permalink) Old 01-28-2005, 06:55 PM
 
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Kh and pH are interelated. Kh is not only buffering ability, but alkalinity..and as alkalinity increases, so does pH.
Without getting into math or chemistry, my tap water is 8dKh and 7.8pH (rested). With a dKh of 16, I could easily see a pH of 8.4 (rested). This time of year tap water tends to be higher in dissolved CO2 which lowers your pH until it outgasses, then your pH goes to a normal 'rested' level.

In other words - what you're seeing sounds very normal. I'd use a mix of R/O water if you wanted to lower hardness/pH a little. Then again, if you kept certain cichlids, you'd have the perfect water for them to start with!
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