Planted Tank Obsessed
Join Date: Jan 2015
Location: Newmarket, Ontario, Canada
dzega brought up an interesting idea (gas saturation). But the focus should be on O2 levels (not CO2). Pearling would be more evident when O2 gas is already saturated.
Has anything occurred to cause the O2 levels in the tank to drop? Maybe you have changed the temperature of the tank a bit? Do you try to control the O2 in any way (surface agitation changed)?
Agreed there is no big concern here (plants are growing) but this still remains an interesting mystery.
Last edited by imcmaster; 03-20-2015 at 04:39 PM.
Reason: pearling might not be seen if O2 level low