What kind of algae is this

[Mbmarkus]

Hey all,

so I got covid and fell off my routine maintenance. I have attached photos. How do I make this go away. First photo is before I clean the rock, second is after a light brushing. Thank you in advance.

 

[vetteguy53081]

Brown algae and hair mat . Start as diatoms and then this stuff grows over it. Best bet is to reduce white light intensity or turn off lights for 3-5 days
If you can pull rock, brush this stuff with hydrogen peroxide. Add 1.5 mp of liquid bacteria per 10 gallons during the day and add some cleaner snails:

4 big turbo
4 astrea
3 cerith
3 nassarius
8-10 blue leg hermits (these are really small)

 

[Mbmarkus]

Thank you so much! Does this stuff choke out corals or upset them?