ID/Help

[Alex's Nano Reef]

Ive seen this algae cover the tank and within 2 days of noticing it i started up the UV Skimmer. seemed to be working at stopping the rapid spread. Then i had a alk swing and within 6 hours i saw these white spots on the glass and back of the tank and some corals were ticked. i fixed the alk and most of the coral is opened back up except a hammer and frogspawn. I was wondering if anyone has a positive ID (i think its diatoms but i could be wrong) and if they have ever encountered whats goin on on my glass. also can this effect my corals well being?

 

[blaxsun]

This looks like dinos.

 

[Ricox]

It could be cyano.

 

[MaxTremors]

I would agree Dino’s. But need a microscope to definitively ID.

 

[saltyhog]

Ostreopsis dino is a strong possibility. Agree microscopic ID is the best course of action.