Thanks both, I'm biding my time seeing how the pond settles this year with roof water going in at present there is a lot of green algae this is probably due partial to impurities coming off the slates so I hope it settles down.
I was aware that fluctuating water levels on standing water with gently sloping sides was very good for birds such as Lapwing, Snipe, Curlew etc but had never thought about frogs, toads etc also finding it beneficial. There is one patch of frog spawn which with today's sunshine would will think have all hatched now, a couple of days ago there was a dark clump of tiny tadpoles in the middle & frog spawn still round the edges.
I don't want the pond as a regular dropping off point for ducks, I want nice clear water with lots of plant life, Diving Beetles, Hawkers, Dragonflies, Damselflies etc. so will case them when ever I see them.
I would like to get some Common Reed as well as Jointed Rush & Flowering Rush but as I say I'm watching how things settle down.
I'll keep you posted as the year goes on, I was amazed how many Diving Beetles there were last year.