Is this Diatoms?

[EmilyB]

I had dinos among every other known algae a few weeks ago, and some major work, rock rinsing scrubbing, lights out, water changes, etc. and my tank looks amazing for almost a week now. I think we have it beat.

Introduced clean up crew again for sure, blue and red and orange hermits, astrea, turbo, margarita snails, a few lettuce nudis, urchin, a pile of detritus stars, etc..