So my pond is not big....and I needed something to get the leaves/stuff off the bottom. I had been having someone do it for me but decided I didn't want to spend the money anymore. I didn't want to buy a vacuum and have to store it either since the pond is not large. So....I read on one of the forums that someone with a smaller pond bought one at Lowe's for $20. Just for fun I went...and guess what? They really had it....it's the kind that you attach to your hose. Anyway, big skeptic that I am, I am impressed! Someone had knocked over an iris pot FULL of ponding medium and it was on the bottom of the pond. This thing got it all up. It's very elementary and you have to empty the bag (which is very nice) often, but for my smaller pond I am thrilled! I do small areas at a time so that I don't put too much water into the pond, but if I wanted to do the whole thing I would just use the de-chlor. Anyway, just wanted to share.....I know the big vacuums work great, but if you want to save money and save yourself some work and you don't have a large pond, well, you might try it.