I had a fun thought, and wanted to share it here. I feel like there could be negative sides to changing the environment so drastically. But I also wonder if anyone has tried.
The general idea is to light a tank from the clear bottom, instead of the top. Light coming in from the bottom glass would be the brightest light.
Duckweed or some other short rooted floating plant would work to give the illusion of a substrate, and I imagine would look complete with shrimp running across it upsidedown.
Plants i think would naturally try to grow towards the light. There is a whole world of 'upside down gardening'. In my head, floated from a string attached to the real bottom. I have seen 'floating rock' setups like this, but these plants would grow on the real bottom of the floating rocks, where the light shines from underneath.
For fish, not sure if this was about fish or not. LOL Upside down catfish and some kind of goofy loach maybe.
What do we think?