micro bubbles from live rock

[Qasimja]

gotta say ive never seen this before been reefing for over 10 years but my tank is about 7 weeks old for the last 2-3 days when i turn the lights on after about an hour or so i can see tiny air bubbles flying around my tank they are coming out of the dry rock they come out of the dry rock then fly around the tank for a moment cause of the powerheads then go to the surface and pop also i do have diatoms but they seem to be burning off i didnt have very much of it to begin with started out with dry rock and carib sea ocean direct sand

ammonia 0.0
nitrite 0.0
nitrate 5.0
ph 8.1

 

[ndrwater]

Sounds like the deepest reaches of your dry roads are filling with water. Over time it should cease