Dinos or Diatoms?? HELP

[jeep454]

After a recent post I made complaining about diatoms...I was losing the battle and realized as the bloom got worse I may in fact have a Dino issue. I know there are plenty of ways to fight this but I need a bit of guidance. Substrate is 75% covered with them siphoning works but they reappear by the morning. They seem to cover the glass too. I attached photos of both substrate and glass. I'll also note nothing really seems to be blanketing the live rock.

Tank info:
-30 gallon
-7Lbs of live rock
-1.5 inch of live sand substrate
-165W reef light that Is on for 11-12h
-1 powerhead
-Xenia
-GSP
-Condy
-Mandarin Goby
-2 Percula Clowns
-1 Arrow Crab
-2 Trochus Snails
-1 Nassarius Snails
-2 large Nerite Snails

-79 Water temp
-phosphate barely detectable
-Nitrate <5
-Calcium 400
-PH 8.2
-KH 8
-Salinity 1.028

New Sump is a 10 gallon with baffles
-filter sock
-protein Skimmer
-media bags with ceramic rings
-activated carbon
-UV Sterilizer

 

[Lavey29]

So fix your nutrient parameters and turkey baste your sand everyday to get them into the water column while your UV is on

 

[Idech]

Some dinos won’t respond to UV or blasting. The best thing to do to start with is to ID them with a microscope.

You can still do other methods while you find the microscope, it won’t hurt.

 

[Townes_Van_Camp]

 

[McCarrick]

You might need to add an additional powerhead. Might not fix the problem but might help