Do NOT put them into the pool! Not only can they become moldy, but the chlorine can cause them to fade.
The only safe way to clean them is to place them into a pillow case, then put them in a washing machine on delicate cycle, cold water. Then hang dry.
No babies can't do anything.
Depends on the pool, but less than a tenth - unless you are swimming in a paddling pool for babies.
You can swim in a pool without chlorine or salt they just keep the pool clean. but if you do it can give you bad skin
Definitely cartridge. You do not want to be messing with DE or sand on an indoor pool. I would go for a Pentair 320 sq ft approx (depending on size of pool).
a pool without a child protecting fence around it
No you cannot, because the pool would leak and not work properly without the liner.
no, the pool must be empty
Duckling become independent of their mother in only a few days after hatching. I think the best thing to do would be to just leave them alone. They will be independent soon anyways.
They never have to enter the pool. Have them hold a stop watch. Have them stand next to the pool.
in a swimming pool
They look like baby tadpoles, they are small black and have a tail. They wriggle around like small worms in the pool water.
yes, you can use the pool without a membership, but their is a small fee, $3 per person.