I don't normally write reviews of things I buy on Amazon because I normally know I am going to like them or have used them in the past from a retail store. This time I had to take time to write a note. I purchased a hot tub, zero experience maintaining one but have been learning as I go. Over time, some rubber mulch particles and little pebbles or sand that don't make it through bio degrade or chemicals or spa filter settled in the bottom. I researched and decided to purchase a pool vac, didn't want one that required plugging in because of water or charging and decided to try this one thinking it would probably be a joke. When I got it I was like "what? yes, sure,,,,,hold your thumb over a small hole at the end of a broom like handle and it will pick up pennies and rocks etc. and that's it?". My first thought was I will give it a try and save the box because this one will surely be going back. WELL. let me tell you, I am in amazement. Best darn thing I ever bought in terms of a home maintenance tool for outside. Lightweight, works like magic, easy to use, and while it requires multiple times, it's so darn simple, just hold your thumb on hole, suck it up, let the water back out and dip again. The spa was spotless in under 10 minutes, the entire bottom of it and clean up is a breeze. To add to that, no assembly, no crazy instructions, also has visuals and I am super happy I bought this. Amazing product and no complicated stuff. Genius! Who knew, a siphon system that works like a charm.