Nature's Mini Water Siphon System

Useless. It says it's good for small tanks. I have a 2.5 gallon tank and this thing is way too small to handle it. This thing is so mini that if you had a fish bowl small enough to use it, you might as well just take the little bit of gravel out and wash it. Even so, I had to literally suck water through it to get it going and who want tank water in their mouth. This thing is not worth your money IMO.

This clog very easily, but otherwise seems to work okay.

The vacuum end is a plastic pipette

IMO No suction mechanism renders this siphon pretty useless. Furthermore the tip of the siphon is really short, so it is really difficult to aim straight at the bottom of the tank even in a very small 5 gallon tank.I am really puzzled how this siphon works. Maybe someone can provide an explanation.

Simple, works as advertised. What more could you ask for?