In most black water environments you won't find plants there are some exceptions but they can require true black water which is softer than soft if you're thinking biotope my favorite is amazon back water streams or southeast asia backwaters which Bettas can be found around downoi and certain crypts
while this is true I'm looking for pictures of blackwater tanks in general, planted and unplanted, biotopes and non-biotopes.
For my tank journal I just call it Amazon Blackwater because it is a blackwater tank with amazon fish, but it is planted and with plants from all over.
I guess mine would be more asian themed, though not very well. Currently has a single sparkling gourami in recovery, and a breeding pair of honey gouramis in it, as well as a large colony of cherry shrimp. Someday I'll have to get updated, non-blurry pictures.