Debris in your pond can encourage growth of algae: therefore cover your pond to stop fallen leaves from entering!
Some plants such as peas need staking or netting! Garden netting can easily be made by yourself: http://j.mp/KbtXpu
Did you already winterise your pond? Does it include netting? Reasons for installing pond netting: http://j.mp/9NNYix
Do you still grow brassicas? Cover them with netting if pigeons are a problem! Have a good harvest: http://j.mp/bCbJnm