I have a little tale...
My middle name is impulsive, so last summer I decided it was vital I had a container pond. I did as much research as I felt I needed; ie none. I knew I needed a practice before I bought a swanky container so I filled a small plastic plant pot with rain water, some stones from my stone collection, a marginal plant and an oxygenating plant to keep the water clear. I loved it during the summer but it became clear the marginal wasn't happy and the the oxygenating plant was almost dead.
My interest waned and over winter it froze, even with a little platic ball in it! It completely dried out over this first bit of warm sun. I definitely no longer had an oxygenating plant.
I put the marginal in the bird bath last month where for some reason it flourished and flowered profusely.
Today I had a little inspection of the newly rain filled neglected pot. It is teeming with life...fabulous...I appreciate much of the life I see will be mosquitos soon, however there are also little beetles darting about and, my favourite, water snails roaming around the debris. I have no idea where the snails have come from but there are at least half a dozen.
What I am certain of is that Mother Nature always has the last laugh, I will have a container poond whether I like it or not...Good job I like it!