Brown algae covering tank

[Bray84]

If it's dinos, it grow really really fast, and look like brown slime, sometime with bubbles on the algae. Turkey baster do really good job. Changing water won't do anything if the rocks keep releasing nutients...

Diatoms usually grow under phosphates conditions, dinos grow under any conditions. You must absolutely care about dinos if it's that, it's a toxic algae.

Looks like that so what's best way to rid tank off it.