Ok so I am having an issue with air bubbles in my display tank stuck to the rocks and sand. It seems to only be when the lights are on. In the morning before the lights come on there seems to be no air bubbles but about mid afternoon they just seem to appear. I am skimming 24 hours a day, is this to much? I will attach a pic. Thanks in advance for your help.
View attachment 10393
View attachment 10394
View attachment 10393
View attachment 10394