Hmmmm Now just take a deep breath and think about how wonderful it looked when it was created and how we all were envious of your lovely garden and the size of your pond. Now if you had been left to your own devices for 6 months and hadn't washed your hair or brushed your teeth you would look a bit like your pond at the moment. But all you need is a little TLC and a new hairbrush and toothbrush and you would look fabulous within the hour. Just think of your pond in the same way. With a little TLC and maybe the loo brush rather than a hairbrush to get out the algae, by the weekend you could have the most marvelous water paradise in the area.
Algae I'll grant you isn't the most attractive pond plant to have in abundance so taking out as much as possible is the only way to get things looking good. Do you need a small boat to get into the middle of your pond or maybe you could wade in to get the lily pot. Lillies are the same as any other plant really when it comes to dividing. Just make sure that you keep some root on each bit and you will be well away. Place the ryzome in the bottom of the pot and cover with some stones to keep it there as there is always the tendency to float back up and leave an empty pot on the bottom.
This time of year the larger plants are taking a battering from the wind and can fall over and get ruined. My Yellow flag Iris was strewn all over the pond one morning after the bad winds we had and I have had to cut everything back as they just wouldn't stand back up again. It was sad as they were flowering but they have already started to send up new shoots making it look not so bare.
There is always a silver lining to everything so look at the pond again and decide wether there was anything that you had wanted to change with it before and implement those changes now. Not by filling it in I hasten to add
. Good Luck You can do it......