snippet of an interview with H. Fischer [13.03.20]. he is into aquaristic since almost 50 years and a member of the aquaristic club Danio in Vienna. I asked him what he thinks about the idea of a garden for a fish.
“Die Idee is vielleicht ned schlecht aber ma sods ausprobieren … dann kann man erst sagen, obs funktioniert oder ned.”

The idea may not be bad, but you should test it. Only then you can say whether it works out or not.