I understand that pearling happens because of photosynthesis. In the presence of light, plants consume CO2 and produce O2 that is released. Now my question is, under optimum conditions (light, nutrients, CO2), is pearling a continuous process in a healthy aquarium? I observed strong pearling when I increased the light from 2.4 to 4.6W/G. However the pearling lasted for two days after which it stopped. Now I only see small bubbles underneath the leaves of my plants. No change in light, CO2 etc.