Substrate choices

[DrMark]

I have barebottom with no fuge/sand bed at all. I used black HDPE on the bottom and alot of it is now covered with shrooms and rics. It's really about what you want it to look like with the maintenance each one has.

Hadnt given much thought before to a barebottom, but the more
I think about it, the black HDPE could be a nice way to go.
Where to get it?
mark