Bubbles over rock and sand on JBJ 28 Nano cube

[Xrod]

Please help. What can this be? Here are the pictures.
At first thought maybe Bubble Algae, but then there are bubbles to thin and microbubbles. Then i thought maybe cyano or dino or diatoms...Now someone told me maybe the skimmer. Just confused....anyone with more experience any comments?

My tank is 3 months old.
28 g JBJ led
octopuss bh 90 skimmer
Vortech MP10

 

[bairdimusprime]

looks like diatoms to me, those microbubbles are possibly from a lack of flow or a dead zone in that area since the whole tank isnt covered in those bubbles. try a change of flow, as well as a water change sucking out the bubbles/ algae good luck!

 

[skinz78]

Agreed I'd crank up the flow if you can?