Brown/Green Algae ID?

Secky

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I’ve set up a new 25g tank and I’m going through the dirty stage. Got like this brown algae first thought it was diatoms however when I turned my LED to a more higher whites I’ve noticed that the algae looks green? Is this still diatoms?

Picture is algae under whites, looks brown under blues. ⬇️⬇️

3758CA0A-9E8C-46BB-81ED-D3F4FD497DA8.jpeg
 

Timfish

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Probably a mix of species. What I do sometimes with any nuisance algae or cyano growing on sand is siphon off the surface layer, soak in H2O2 for a day or so, rinse well with fresh water, let dry for a few days then return to the tank.
 
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