Diver, - I kept freshwater tropicals for years, and I think I'm right when I say that goldfish, being
cold freshwater, are even more restrictive. - But I can't recall any plants that weren't some shade of green! - Other than the flowers on some floating plants. ............. I could be wrong!
What colours had you in mind? ...... Perhaps I've missed something!
......... Are you thinking saltwater tropical?