Need help removing algae ?!

[SaltwaterTanks]

I’ve had his tank for a while and there have always been these algae spots on the glass. I am able to get the green ones off but the brown are very hard and even if I spent the day scrubbing it I don’t think it would all come off . Any tips what should I do ?

 

[AlgaeBarn]

I’ve had his tank for a while and there have always been these algae spots on the glass. I am able to get the green ones off but the brown are very hard and even if I spent the day scrubbing it I don’t think it would all come off . Any tips what should I do ?

Hi! Would you say that the spots are brown, or more of an orange?

 

[Shawsy81]

Razor blade to scrape but looks like coralline algae to me

 

[SaltwaterTanks]

Hi! Would you say that the spots are brown, or more of an orange?

They look more of a brown but I can also see it as orange a little bit but more brown

 

[NashobaTek]

Mr clean magic eraser original

 

[AlgaeBarn]

They look more of a brown but I can also see it as orange a little bit but more brown

if it is coralline algae you could do manual removal or an urchin to keep it in check ~ Shaun K.