ID please?

[Artisan]

I thought it might be brown hair algae, but the growth pattern is throwing me off. The picture is after using a firm toothbrush to scrape the rocks. It's extremely difficult to remove at the "root".

 

[cloak]

It just looks like your basic GHA to me.

 

[Tyreef2016]

It just looks like your basic GHA to me.

+1

 

[Artisan]

I was hoping the pictures would be clearer' but the algae in question grows in tufts.

 

[Artisan]

Hmmm that's really puzzling because it's a low nutrient system. Everything tests at zero with salifert and I make my own ro/di

 

[lauderdalestunner]

Green hair alga. Check your phosphate and nitrate levels.

 

[Artisan]

Thanks for the feedback, everyone! It must be an error on my end.

 

[Artisan]

Yep, it looks like I overdosed iron with Red Sea coral colors.

 

[akarusso]

Hair Alage

 

[Salty1962]

Could also be green turf algae if it's hard to remove. GHA typically brushes off with a toothbrush.