They are long finned white clouds basically, called meteor minnows. They are not as popular as it takes some time for the males finnage to really come in. I prefer them and think they are just breathtaking.
The tubs are just stock tubs, used for livestock waterers, etc. You can get them at places like tractor supply or landscaping companies. I got two on Craigslist for something like $60. I am setting up the second one today as well.
The wood is on there because my husband objected to big black tubs sitting on our deck all summer, lol. He made the wood frames to make them more decorative. They can be lifted off to break them down for the winter and then we will set them back up next spring.
We plan on painting the wood still to match our house and I will update with pictures as I go