Nuisance Algae (Brown?)

Deltec

merfury1989

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Hi,

I am kinda struggling with this Algae, Brown Hair? Diatom?
My nitrates are below 5ppm (Salifert Test) and Phos at 0ppm (as per Hana Test)

My tank is 23G Tank
- I use Seachem Purigen (100ml)
- Also 2 Tsp of Rowaphos
*All of these were added 1 week ago, and picture was taken after 1 week.

I feed once a day (roughly half cube or less)

How do I get rid of this Algae? Would it go all on its own? Or do I need to manually pluck them out.
I tried to remove with a brush, but they are very stubborn, and doesn't remove easily.
Before adding purigen and rowaphos about 1 week ago, my glass also had algae, but thats almost gone now, its just the rocks one I am worried about, and the ones over the corals.

Advice will be highly appreciated.

20230413_110932_resized.jpg 20230413_110937_resized.jpg
 
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