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Re: Bubbles During Water Changes
mark.fisher at tpwd_state.tx.us
wrote:
>My plants pearled for 2-3 days after a water change, and I suspected
>they were CO2-limited (this is back when I did not fertilize with
>CO2).
>I bought a LaMotte CO2 test kit, and measured CO2 after a water
>change (3-4 ppm) and when the plants stopped bubbling in 2-3 days (0
>ppm). This prompted me to add CO2 via the sugar-yeast method, and my
>plants bubbled all week long. CO2 was now 10-15 ppm. I later
>graduated to a 20# cylinder, and finally to PMDD.
You would need more than 3-4 ppm of CO2 to keep your plants bubbling for 2-3
days. 3-4 ppm is very low. I got a 7ppm reading before I started adding CO2
and my plants didn't do any bubbling of the kind. Only after a water change
did they do that.
>Others have experienced pearling after a water change, and they
>already add CO2; obviously, CO2 is not always the culprit, but it was
>in my case.
I don't think your case was what you thought it was. In my opinion you are
mistaken.