Amusing figure from an old reef book

[Chrisv.]

You too can have a lush thick layer of filamentous algae. Published in 1995: Marine Fishes and Invertebrates in your own Home.

 

[fish farmer]

I had a book from a bit earlier than that. Back in the day there were recommendations for using plant fertilizer and there were pictures of some impressive tanks with various macros like calerpa being grown out in the DT.