Hi, I am new to reef aquarium and it's been running for about a month now. Wish I knew about this forum before starting the aquarium, lots of good information here. So I have a Fluvo Evo 13.5 with stock lighting. I upgraded the return pump to the Eheim campact 1000. I am also running chemipure blue and marinepure bioballs. I started having brown algae on the rocks, sand, and glass about 5 days ago. The algae on the rocks turned green pretty quickly, but it's still brown everywhere else. I thought it was diatoms at first, but then these larger brownish algae appeared and made me question what they were. Do you guys know what these are?
Ph: around 8
Phos: 0-0.25
Nitrate: 0-5.0

Ph: around 8
Phos: 0-0.25
Nitrate: 0-5.0


