Dino identification pls

[Zozi]

Hi,

I have a problem with my 4 year old aquarium.. the aquarium is full of sps corals and a couple of large lps colonies.. the dino appeared after a procedure in the aquarium which included removing a couple of bta anemones. on this occasion I raised a lot of detritus.. the next day I started to see that brown accumulation in places.. my aquarium is far from ulns.. no3 arround 100, and po4 arround 0.2-0.5, uv is constantly active 0-24..
the kh consumption is still stable and the corals look super open, but the brown slime is taking more and more of the system every day..
it seems to me that they stay in clumps on the stones overnight and don't have excessive strings as usual... the bubbles almost don't even exist like in some cases

here are the pictures I took under the microscope, but I can't find anything similar on the internet
Can any of you help me?

 

[dwest]

They don’t look like any dino that I’ve seen. I don’t know what they are but guessing diatoms. Let’s see if @taricha is around.

 

[Zozi]

This how they look like.. intresting thing when i collect them and mix them in the cup.. they going apart and then after 10min group all together.. like dinos..

Any help would be awesome

 

[taricha]

here are the pictures I took under the microscope, but I can't find anything similar on the internet
Can any of you help me?

All the cells in these pics are diatoms.