Hi, I have problem with brown algae, I guess that it's a diatom on the photo.
My tank:
300l tank 120 x 50 x 45, light 0,5 W/l - 10 hours per day, CO2 - Pressurised through day.
I used to dose by EI method, but I wasn't able to ensure enough CO2, so I transfer to PPS Pro. Algae situation is now...