Could be that it has a blockage in the throat of it, there isn't enough suction coming through it. Or the hose may have a hole and it is sucking air.
Repeated motion of a joint, such as during swimming, can cause tendonitis. See related link.
Yes.
Yes. Don't worry, swimming is the only exercise where lack of oxygen will cause you to black out
It would cause excessive mud and the swimming pool would sink slightly. It would only cause a sinkhole if there was a hole underground under the pool.
Have you cleaned the filter? Ken
No
No, but it could cause similar appearing skin irritations.
yes
Yes
cause your an idiot
cause you don't want to go swimming in a regular swim thing outfit or something
There are lots of things that can cause that. Bad gas, dirty fuel filter, dirty air filter, and a number of other things can cause it.