Tank/Dino help

[AquaSixAquaticsReef]

I believe I have a dinoflagellate outbreak in my tank. I have watched what BRS says to do to help with this problem (such as adding copepods, which I added 3 jars last week) , but I am wondering if there may be some more things to correct. After looking through some other threads, I plan to order some sodium silicate to dose into my tank, and I am running a Hygger UV light that is just sitting in the sump by the protein skimmer. It is only a 9-watt light; it is just what I had on hand. I am open to any recommendations on lights I can add to my sump that would not break the bank but would work much better for a 90-gallon tank with a 30-ish gallon sump. Recently, my tank bottomed out on phosphate, and I am wondering if that is what caused this outbreak. However, I want to make sure I am not doing anything else wrong. As of tonight, all of my tests showed the following:

Calcium 420
Phosphates .04
Nitrates 10
Alkalinity 8
Salinity 1.026
PH 8.0

Any help is appreciated! Thanks!

 

[Subsea]

Zero phosphate would contribute to Dinoflagellets.

Maintaining phosphate concentration; adding pods & silicates are all good.

Depending on the type of Dinoflagellet determines if your UV is effective.

“I believe I have a dinoflagellate outbreak in my tank.”
Please provide full tank shot with white light.

 

[AquaSixAquaticsReef]

Zero phosphate would contribute to Dinoflagellets.

Maintaining phosphate concentration; adding pods & silicates are all good.

Depending on the type of Dinoflagellet determines if your UV is effective.

I don’t have a microscope to determine. I’ve kinda just narrowed it down by what’s happening in my tank. All of my snails, except my conch and a large turbo, have died/disappeared. Another thing I’ve noticed is all of the bubbles where it’s at, rocks and sand, but I don’t know if that helps classify it.

 

[AquaSixAquaticsReef]

Here’s a video from the other day of the sand. The main difference of today is there is a ton of bubbles on the sand now. My lights have been off tonight so I don’t have a full white light picture but I could get one tomorrow.