I’ve been having this algae and I finally got a microscope and I have no idea what it is but it’s all over my sand bed and rock and when I take it off the sand beg it’s like one big mat of algae that comes right off, idk what to look for under the microscope but I did my best with the sample and the algae does not dissapear at night and its fast growing I tested nitrates and they were at pretty much zero which was odd it doesn’t seem toxic the coral is doing just fine please help me identify it so I can get rid of this forever!!?