bubbles on rock

[svynx]

Hey everyone. I've got bubbles on everything. Not microbubbles, mind you. My parameters are all fine. Fuge is running well (just trimmed the algae about a week ago). When I get up in the morning, before the lights turn on, things look great. When I get home after work, everything is covered in bubbles. I'm in the process of scraping some nuisence algae of some rock, but there isn't that much. Any ideas?
Thanks

 

[D to the P]

It could be the algae releasing O2 while conducting photosynthesis. You did mention that it only happens when the lights are on for a while.