Help with id. Algae outbreak getting bad.

[Keeponreefing]

So I started to get some algae of some sort. I think it's dino. There seems to be some cyano on the sand bed. This started a few weeks ago and wasn't too bad I started to siphon and blasting the rocks and such. It seems to hang on to the xenia the most. My bird's nest has zero polyp extension today and want to try to get an ID to know what I'm dealing with.

Background on the tank:
It's a 20g IM concept drop off
Ai prime
Eshopps nano skimmer
Finnex HMO 100w heater
Tunze nanostream 6015 power head
Tunze nano ato
Lights on 8hrs, peak for 6hrs
Coral life 100gpd rodi
Red sea coral pro salt (new bucket)
BRS rox carbon
BRS gfo
Both ran in media bags
I have about 30lbs of live rock, maybe 20lbs of sand

The tank has been up since 10/1/17. All of the livestock/rock/corals and water came from a 90g I downsized. So the tank is newly set up but all from my old setup. Any help is appreciated.

 

[Keeponreefing]

Just going to add that my clean crew is still alive which isn't consistent with dino.

 

[Bret Brinkmann]

Dealing dinoflagellates myself right now. CUC also is just fine. Although I think I lost three hydnophoras to it when I cleaned a bunch off of all of my rocks. There are several different types of dinos. Which one you have will determine the best course of action to try. Look up how to identify them and figure out which one you have first. From what I am reading it will go a long way toward getting rid of it.