Not necessarily there many lagoons and streams with clear water and aquatic plants in Brazil, Peru, and Venezuela etc.
Look for a place called Bonito Brazil this location is by far one of the most beautiful places on earth for us aquatic plant lovers.
The water comes out of a plateau so is as clean as air the flora and fauna is overwhelming there is videos on line about this place and many of the big names in the aquatic plant world are conducting research and documenting this wonderful place.
The black water is confined to the Rio Negro and small ponds and lagoons trapped in the jungle throughout the Amazon.
So there is many ways to create a biotope the river is huge so it goes from mountain streams with cold water from the Andes all the way to brackish water! Have you seen the Anableps anableps before?
Keep us posted and good luck.
Best regards,
Luis Navarro
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