Wasn't sure whether to put this in here or 'Plants'. Anyway,my Dad bless him bought us a water lily yesterday - Nymphaea 'Marliacea Chromatella'. A lovely yellow flower,though it does get to 1 metre plus in diameter. Our pond is about 2.5 metres by 1.5 so might have to trim some leaves next year if it threatens to overpower the other plants. At the moment its very small.
The other plants I have are oxygenator elodea crispa,scirpus cernuus 'fibre-optic grass' and caltha palustris 'marsh marigold' - all courtesy of our Lyn bless her.