Pearling - rising oxygen bubbles?

[Newzpix]

I've not seen pearling on my plants but each evening, when I arrive home from work around 6:30pm, I have an orchestra of rising bubbles off the plants. Looks like I've got multiple airstones going.

Is this normal?

CO2 injection + high lighting + eco-complete substrate

[rich311k]

I hope so. My tank does the samething. I think its a good sign that we have very happy plants.

[crazycat]

yes--happy, well fed plants! well done!

[malkore]

as long as they are frequent small bubbles, and not steady streams of almost microscopic bubbles.

the former is pearling, and means the water has reached O2 saturation so the plants respirining oxygen must stay in gas form.
The latter is streaming, and indicates plant trauma/tissue damage, and they are 'bleeding' oxygen into the water.

Its most likely pearling though, since you indicate it takes until evening to occur...O2 saturation has to build up during the day before pearling takes place.

[Newzpix]

Malkore---I have both events happening.

Mostly random bubbles - some small, others larger. But I remember one plant letting off a steady stream that reaches from the leaf on up to the top of the tank. Not certain which plant right now.

What is the cause of rhte trauma/tissue damage??

[Hoovercat]

Usually either pruning or nutrient deficiency causing holes in leaves which "bleed" oxygen.