u/Hatanache

TLDR; Do these plants look healthy or need attention?

Hi, so we are new owners of an aquarium, have it now for 4 weeks and for 1 week we also have fish after checking the water stats at Our local store.

But now our plants have these weird fiber-ish algae on the plants and some have dark spots. Should we just cut them off and let them regrow or is this normal? We have 120L, tap water mixed with osmosis water