surely you want to be looking at temperate species? However i follow a guy on FB called Jim cumming, he lives in Canada and he keeps a few species outside in the warmer months!
There is a cool video by Marks Aquatics where he does guppies in a nice summer tub.
I'm planning one myself. I will probably get a £20 clear plastic tub which holds around 80-100 litres. I am mainly gonna use this for my plants which which i trim and end up throwing. A nice plant breeding for profit tub if you will.
However, if the tub does well, I might add endlers, especially the blue star ones. If you get them wild caught or F1/F2 then they actually do quite well in Coldwater.
surely you want to be looking at temperate species? However i follow a guy on FB called Jim cumming, he lives in Canada and he keeps a few species outside in the warmer months!