fish_4_all
Aquarium Advice Addict
The last 2 times I did a gravel vac I noticed something odd. Peas sized air bubbles are coming up when i disturb the gravel. The gravel isn't that dirty, actually less than it was before I started to feed less. What could be causing this? I do run an airstone at night and it is running pretty strong, could this cause it? Is there decay I am not aware of causing this? Could it be access CO2?