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post #1 of 4 (permalink) Old 01-01-2012, 03:25 AM Thread Starter
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ph?

I just started using DIY co2, not even 6 hrs ago. Do I need to watch my ph? my current ph is always around 7.8 or 8 depending how soon after a water change I test. My gh is 7 and kh is something like 17. Do I really need to worry about the ph with my setup?
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post #2 of 4 (permalink) Old 01-01-2012, 05:46 AM
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Yes, the drop in pH shows how much and how effectively the CO2 is getting into your water. Whether the pH starts at 9 or or at 6 and the KH is 0 or 50 too much CO2 will kill your fauna. The safe zone depends on your setup. I understand that yeast CO2 doesn't often produce enough CO2 to do this but it is always possible.


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post #3 of 4 (permalink) Old 01-01-2012, 06:00 AM
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Many of us don't worry about pH, ever. You can if you'd like, just to see what CO2 does to your pH. But my guess is that with a KH of 17 (really? wow), you won't notice a drop with DIY CO2 at all. But, in any case, a drop in pH as a result of CO2 injection is irrelevant. It won't have an effect on anything. The CO2 that causes that drop, however, will.

If anything, I'd suggest you test your CO2 level instead with a drop checker to get an idea of how much CO2 you're actually injecting into the water column.

You didn't mention how big your tank is, or the size or number of bottles you're using, but generally you're safe with a 2-liter bottle, using a basic sugar/yeast mix and a basic diffuser, per 10 gallons of tank water. There are variables, however, so you may want to start smaller. Good luck!
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post #4 of 4 (permalink) Old 01-01-2012, 01:13 PM Thread Starter
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Then I should be way safe. I have 2-2L bottles in my 65 gal. and I have it running thru a power-head/reactor. I will get a drop checker.

and yes 17kh. I have checked it several times and each time its 16 or 17. Unless my kh test kit is messed up. I know I have very hard water. And this is after I run it thru a water softner.
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