The pool water level will correspond roughly to the centerline of the float. So raising the float height raises the water level and vice versa. The float and its short rod connect to the float valve with a small 'wing' nut or screw. Using a small pair of pliers, carefully loosen this screw a bit until the float/rod pivots freely up and down on the valve assembly. Reposition it where you would like it, and retighten the screw. (No need to overtighten--just snug so the float is fixed to the valve portion.) It may take a couple of days for the level to adjust; then go back and readjust the float if needed. I would not 'bend the rod', as some have suggested, as the rod on this type of float is usually very short and doing so will likely break off the float or damage the valve.
You can try bending the rod to the float slightly up or down.
Yes
Usually you would add muriatic acid to adjust the pools acid level.
So you don't sink.
Buoyancy
Because it is denser than you
A cork has a low density. It is lower then water. That causes it to float.
You can try bending the rod to the float slightly up or down.
Float valve is a device used on swimming pools. It is designed to keep the skimmer closed and to control the air flow into the pump when the water level gets low.
Swimming pool buffer is a type of chemical treatment used to adjust the pH balance of the water. It helps to maintain proper water conditions which are ideal for swimming.
To adjust pH and/or lower alkalinity.
It is easier to float because the sea water is denser than water found in a swimming pool. This is caused by the salt in the oceans.