Re: Bubbles During Water Changes
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.
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.