Depends on what you stock it with and what you're using for bait.
No
Depending on the quality of the bacterial control in the pool, it is technically possible.
In Pokemon platinum there is a pool in the resort area and you can sometimes find a lvl100 magikarp in the pool
The health risks of a poorly maintained pool can be fatal. You can catch many infections.
To remove sediment from a vinyl quick set pool you will need a pool vacuum. Move the vacuum very slowly as you work so that it has a chance to catch everything.
You use the super rod outside of Dragonspiral Tower in one of the pool looking holes
Well you can put a strong chlorine in it,or just catch them with a cup. They are easy to catch :) i did that...
the surface and the pockets ball catch. maybe the balls if any are chipped
Filter it, you need something to catch all the organisms your killing. The filter pump will still recirculate.
I have observed these in captivity and in the wild. Usually they catch them by blundering into them, then tear off after them. However, when catching prey on the surface ( drowning bugs) , they appear to follow underwater vibrations transmitted from the bug's struggling.
Run a raingutter spout to it to catch rainwater to water a garden or shrubs........free water.........green tip from Lunatic
Depending on how much hair they let loose there is not all that much to worry about. assuming the animal is reasonably clean. In fact there is a greater risk in letting other humans use the pool as they can have the diseases that you can catch.