tiny air bubbles on rock

[nolifer]

Hi there after some advise on this issue I'm having, so my tank has been up and running for just over 3 months. what I did notice was some kind of bloom diatoms then this cleared up and i started to notice little tiny air bubbles here is a picture sorry it's not the greatest

it also had

So I've blacked the tank out for 3 days and the bubbles have come back on the rock only appear when lights have been on for a bit and go once there away I have an idea of what it is but would like to hear what others say?

here is the latest tests
temp 25.8
ph 8.2
ammonia 0
nitrite 0
nitrate 16 (redsea testkit) high range test
po4 0.007 (redsea test kit)
sa 1.024
alk 7.3
cal 430
mag 1360
not done a water change in 2 weeks i use coral pro salt

 

[Retro Reefer]

Hard to tell exactly from the pictures but It’s most likely just bacteria or slime algae and will pass in time it’s all part of the new tank uglies that everyone goes through for the first year

BTW welcome to R2R , be sure to post a intro in the meet and greet thread..

 

[John3]

Looks like the start of dinos.