Mrs garden thats fantastic! Very creative. I will post pictures when we have completed ours
We once had a really small pond (in a sink - we inherited it along with the goldfish it contained) and when the weather got warm the poor goldfish were gasping for oxygen, so we got a tiny tiny water feature pump and created a sort of a waterfall with a reclaimed victorian standpipe - it aerated the water really quite well as long as you cleaned the filter every few days in the summer.
This shows how the forum is such an inspiration and how we help each other.
Native hornwort, doesn't need planting - you just throw it in and it sort of floats about and grows without you having to do anything - perfect for a mini pond
I have a mini pond made out of a Belfast sink. I put in the shade, because I was worried about evaporation in the hot weather and even in the shade last summer it dropped a few inches. So I would put it in a shady patch if I was you. It's already got lesser water boatman and lots of water daphnia, I'd definitely make another.