Algae identification

[brichard925]

what type of algae is growing on top of the GHA?

Right now for the GHA, i am lessening the hours my light is on and bulking up my CUC. Anything else I should do and what should I do about the redish gray algae thats popping up?

Thanks!

 

[19Mateo83]

Pencil urchin. They are lawnmowers.