The Great White pool cleaner
you just type pebble go.
The smallest type of rock is a pebble. A pebble can be made out of most rocks and is the size of a marble.
Pool with a vinyl liner.
obviosly its the dyson ball
One of the best ways to prevent problems with your swimming pool is by running the pump and circulating the water. The best care for the pool varies depending on the type of pool you have but keeping proper water chemistry is important for any pool.
Mirage
Any type of material that is A) Thick B) Make sure the material is an not made of any type of Insulator like paper or wood C) The best type of pool cover that keeps your pool warm and clean is better off to be a plastic cover.
If it is structurally safe to empty the pool (consider type of pool, ground water level etc - check with a Pool Service) sure it can be emptied and refilled. That's probably the best way to clean up the pool walls etc and star with fresh water. Add salt and connect the Saline System and you'll have the best pool water in town. If you cannot empty the pool, you need adjust pH to correct range and treat with chlorine (check dosage wih Pool Shop or Pool Service Co) and vacuum - probably best to vacuum to waste, not into your filter. You also need to have the filter stripped down and checked out. If your pool is that green then it may be easiest to drain, clean and start fresh. Be carful draing a pool in the winter as high water tables could push the pool up out of the ground like floating a barge.
You could use your pool pump. or get a submersible pump. it is also not difficult to siphon an above ground pool with a pool vacuum hose. all you need is somewhere to run the water to.
The weight of anything depends on what it's made of and how large it is. You'd have to weigh the individual pebble to be certain.
A dyson is by far the best way to clean up any type of pet hair.
yes A pebble is a very small rock.