Just wanted to share my outdoor containers collection. After a lot of trial and error with substrate, fish and plants, finally I seem to have found relatively a good balance in them.
Container #1: female betta tub
Size: 1.5' radius and 2' depth.
Substrate: garden soil.
Other hardware: one brick, I use stones, bricks because at the time of water change, direct impact of water wi disturb the substrate.
Plants: large echinodorous x 3, Cryptocoryne Spiralis x 1, ludwigia sedoides x 2, Cryptocoryne wendtii (not seen in the pic): 6, a huge bunch of najas indica and few lilies, one bunch of ludwigia ovalis.
Inhabitants: 4 female HMPK betta
Wc: once a week, top up: often.
Pic:

Cheers,
Karthik