I am a lifeguard and used many pool vacuums and they suck, they don't produce a lot of pressure. Also many vacuums hook up to the pool filtration system. The vacuums also have wheel so if you don't have a cement bottom you won't be able to roll in on the ground. The filter getting clogged is also something to concidered. It's not bad if you have A small cements or liner bottom pond, but I am sure there is something more specialized for ponds which will be better.