First, the small variation in thickness between makes and models of solar pool covers will not significantly change the amount of heat absorbed by the water. That being said, a thicker pool cover may be more tear or damage resistant than a thinner cover and thereby, last longer. But it may also be more expensive and heavier, especially when wet as you pull it out of the pool. Hope this helps ...
The typically thickness for a pool covering should be 2 mm. This allows the pool to retain the heat of the water.
The best pool cover is 12 mil thick. They generally cost several hundred dollars and can be purchased from any pool store.
yes
The insulating property's of the cover may stop heat escaping resulting in the pool heating more quickly,
The thickness is usually relative to the 'years' of warranty on the cover.. the thicker the cover, the more layers, or thicker layer of protective/insulative coating on the core of the solar blanket. In my experience it is worth buying the extra thick cover. they are much more durable , which is good because the corrosive nature of the water over the years.
It's not possible to add optimizer plus to a pool with the solar cover on. You will need to remove the solar cover from part or all of the pool in order to put optimizer or other pool treatment products into your swimming pool water.
Useless
Try a solar pool cover. Blue or black is best.
No
The side of the pool cover with bubbles is the lower side.
when you are in the pool
They are the same thing basically. Pool Cover, Solar Cover, solar Blanket are all used interchangeably. It's basically some material, usually a plastic bubble mesh or vinyl covering that goes over the pool. The exception to this is Winter Cover which generally is heavier and designed to protect your pool during long winter months.
Bubbles down
It is depends on the type, brand and size. It cost about $219 for the 10m x 6m solar swimming pool blanket cover and $512 for the solar pool cover 500 micron series.