Dinoflagellates!!!!!!

I've been dealing with this around 2 weeks now, my tank is a 75 gallon mixed reef that I started on April 19 2012. I started the tank with NutriSea Water and have used RO/DI from day one.
My water parameters are:
Ammonia 0
Nitrite 0
Nitrate 0
Phosphates 0

I'm just not sure what it is, the color is dark brown looks like a carpet on my sandbed. I've stirred it up and sifted sand to then just come back in a few hours.
Any help and advice on what to do about this?

I attached some pictures:

 

Looks like diatoms to me. They are feeding off silicates. Once consumed, they will disappear on their own. In my experience, a week or two.

 

Looks like diatoms to me as well.

 

Some of it has stringy bubbles, doesn't look like that from the picture cause I turned it over. I just added a gfo reactor see if that helps. I tested and all my levels are good I assume all the nutrients are suspended in the diatoms. I will post more pictures of when it gets bad. Is there any good solution for this?

 

If it is diatoms, the issue will resolve over time as the silicates are used up.

 

Look even my Jawfish is mad as hell, look at this stuff.

 

Love, love those fish.

How old is the tank and have you added any new equipment or sand?

 

The tank is 5 months old I used bio active aragonite sand. I stirred the sand a few weeks ago and I think that's when it started.

 

Well if that is the case you need to make sure that you are not developing Dinoflagellates.

It can appear as brown in coloration with the development of air bubbles, the bubbles increasing as the lighting periods continues through the day.

Take a look at the last few pages of Logans thread and see it it looks familiar.

http://www.3reef.com/forums/show-off-your-fish-tanks/logans-75g-pic-update-pg-87-a-121825-91.html

 

I steered my sand after my tank got cycled and after 3-4 days i had the same thing all over my sand. I decided not to do anything but 20% WC and it went away within a week followed by cyano and then bryopsys outbreak