You can leave or get into the pond and remove by hand - unless the bottom is concrete in which case you can dig out

You can get a hoover type thing from a good pet shop (one that has fish equipment, they are around five pounds though) It is just a plastic pipe with a nossil on the end which when you fully submerge it and suck the air from the other end of the pipe will lift the muck from the bottom of the pond. They are made for fish tanks, but should be good for ponds too????? Ask the shop staff.

No Samba they will not work for ponds - suction is not good enough and the large size of material will block the tube.

First, skim off any bits of organic matter that are floating on top. Then, mix about 1/2 liter of horticultural gypsum into 20 liters of hot water, and stir well for at least 5 minutes. Put the solution into a watering can and sprinkle over the surface of the pond, About 4 liters of solution to every 400 liters of pond water. That will "flocculate" (make the particles stick together in clumps) the suspended clay, so it sinks to the bottom of the pond, to be shoveled up the next time you clean. The water should be clear in less than a day. Depending on the nutrient content of the soil, you may get an algal bloom for a few days to a few weeks, but it should clear up on it's own.

Whoa! It took me way too long to type that, obviously!

if it isnt much i wouldnt worry to much .

Indeed we've always got some silt at the bottom of the pond. Once a year I get into the pond and remove most of the gunk but we really don't worry about.

i tell ya what moon thats probably one of the best bits of information you can give its natural and i never clean my pond out and never have to .a bit of silt is healthy .

I think a garden can be over manicured NP

me to definatly moon grower . my front garden is just overcrowded lol . a lot of plants know egsactly what to do realy .