Best answer.... Don't fiberglass... Fiberglass pools come as one structure. Replaster or get a new liner....
Usually iron
yes you can put it in the pool. However, it may damage it.
YES
put a quarter at the bottom
I would not suggest a water trampoline for your home swimming pool. You can not control the trajectory when you jump and injuries could be caused if you strike the pool skirt.
Pump the water out or put a cover over the pool.
Water and chlorine.
I will not use the swimming pool today until after you chlorinate it.
'Swimming Pool', sometimes shortened to 'Pool'.
Muriatic Acid
Put a scratch and sniff sticker at the bottom of a swimming pool
There is no such thing.