pH Drop Using Leaves & Wood Experiment - The Planted Tank Forum
 
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post #1 of 8 (permalink) Old 11-10-2015, 05:30 PM Thread Starter
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pH Drop Using Leaves & Wood Experiment

The results are in. Wow, what a drop! Starting at a pH of 7.6 @ 55 degrees F. Tank with Leaves in 24hrs - down to 6.6pH. Tank with Wood in 24hrs - down to 6.8.
Specifics with pictures on my blog.
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post #2 of 8 (permalink) Old 11-10-2015, 07:50 PM
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What was your gh and kh? I've put wood and leaves in my tanks with gh and kh around 10 and I get maybe a 0.1 ph drop
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post #3 of 8 (permalink) Old 11-10-2015, 07:55 PM Thread Starter
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Originally Posted by theatermusic87 View Post
What was your gh and kh? I've put wood and leaves in my tanks with gh and kh around 10 and I get maybe a 0.1 ph drop
Don't know. Didn't test those.
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post #4 of 8 (permalink) Old 11-10-2015, 08:00 PM
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KH is what restricts the ability of pH to fluctuate, so you'll want to test.
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post #5 of 8 (permalink) Old 11-10-2015, 08:11 PM Thread Starter
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Originally Posted by AdamTill View Post
KH is what restricts the ability of pH to fluctuate, so you'll want to test.
Good point. Ooops. Oh well. I really didn't expect such a large change at all. And so quickly. But, obviously the KH is such that I can have a large pH change in 24 hours. If the pH hadn't changed much at all, then I may have just chalked it up to an 'industry myth'. Wouldn't I be able to figure KH from these parameters anyway? I have temperature and pH, it should reverse by the charts, right? I'll check and see if I can find my KH due to the pH change at that temperature.
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post #6 of 8 (permalink) Old 11-10-2015, 08:15 PM
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Quote:
Originally Posted by AWolf View Post
The results are in. Wow, what a drop! Starting at a pH of 7.6 @ 55 degrees F. Tank with Leaves in 24hrs - down to 6.6pH. Tank with Wood in 24hrs - down to 6.8.
Specifics with pictures on my blog.


Interesting. Is that initial ph of 7.6 what you get out of the tap or is it tested after letting that tap water sit for 24 hours?

What kind of leaves and what kind of wood?

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post #7 of 8 (permalink) Old 11-10-2015, 08:41 PM Thread Starter
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Interesting. Is that initial ph of 7.6 what you get out of the tap or is it tested after letting that tap water sit for 24 hours?

What kind of leaves and what kind of wood?
My tap is very acid, at about 6.0. So I have to get the water very cold (55F in this case) to bring the pH up to 7.6. I let it sit outside at 55 degrees F for 7 days. Then I added fallen oak leaves to one tank, and pieces of hardwood I have dried and seasoned for the past 5 years outside. (It used to be my walking stick. I cut it up to fit into the tank.) I don't know what kind of hardwood it is. Very pretty beige and dark brown marbling on the wood, however. I might add it to my tanks inside eventually.
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post #8 of 8 (permalink) Old 11-10-2015, 09:18 PM Thread Starter
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I'm of the opinion that any type of dried/fallen leaves will work just as well. Same for hardwood. I don't have any driftwood, so I can't test to see if it changes pH the same as the hardwood. But because driftwood has been underwater for such a long time, I wonder if it can affect pH as much as the hardwood. That's another experiment for another day!
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