Bubbles in water column

[Rendao]

Hi, part way through a fishless tank cycle. Have the air curtain turned up to full, as advised for cycling. However the water now contains hundreds if not thousands of tiny bubbles. Is this good for my plants or not, and should I turn the air pump down. Got CO2 going in eight hours a day (when the lights are on) at a rate of 1 bubble every four seconds. Any advice appreciated.

 

[Rendao]

Anyone any ideas? pH is dropping and wondered if this was the cause!

 

[Hholly]

You might need to do a PWC to restore the buffers in the water.

 

[Nubster]

Remember, CO2 is an acid. Adding it to the water will drop the pH.