Probably not, shock and chlorine products are sanitizers. You mention 'city' water which is drinkable and clean.
While there may be some residual manufacturing chemicals on the vinyl itself those would probably be significantly diluted.
However the longer the water stays exposed to the environment the more likely it will need some sanitizing product. Don't wait too long, and test regularly.
Yes, always shock your pool the first time you use it brand new or each year.
A person should shock their pool right after they fill it up for the first time. This will cut down on bacteria growth that often occurs in un-chlorinated pool water.
the amnion is a fluid-filled sac that will protect the embryo from mechanical shock.
Bilstein Monroe
G-shock
It's a g-shock
Backwash first then shock. If you shock and then backwash you will be throwing away the shock you just put.
All shock absorbers for automobiles are hydraulic. The shock is filled with hydraulic fluid that acts as a damper to control the bounce of the car. The fluid absorbs the impact and dampens it.
Hydro Shock is a brand name for a hollow point bullet. It's one of the better ones.
A fore shock is a shock before the earthquake(main shock) and can be quite danerous. An after shock is a shock after an earthquake that are usually way more dangerous then foreshocks.
The best brand of watches beginning with g is G-Shock
1) fore shock 2) earthquake shock 3) after shock
A bursa is the sac that acts as a shock absorber between tendon and bone. A rupture of the sac can cause damage as well as severe pain.
Yes, most Sony portable cd players come with an anti-shock feature.