Algae i think

[strider]

id on 2 algae the first is a lime green colour looks like mould on a couple of rocks





and the second is like tiny tufts of grass growing on the glass
probably really lame questions but i have to ask.

[Paul Davies]

I have that lime algae also, probably some sort of coraline, never been a problem with me in the past or present, the tufts of grass might be hair algae, but cannot see in the photo.

Are the strands thin like hair ?

[strider]

yes loads of little green dots have appeared with 6 or more tiny little green strands coming out of each like hair