In a small pool this size, each cup (8 oz.) bleach will raise the cl by 1.5 ppm. However, to tell you how high shock level is for your pool, you'll need to give us some water testing results. Can you give us some current results and we'll go from there?

When you are just adding a small maintenance dose of bleach, it is ok to get in after a short time -- maybe half hour or so. Just long enough to let the bleach get distributed in the water.

Since the filters on these small pools don't really do that great of a job from what I've heard, you will probably need to run it quite a bit. If it was me, I'd probably run it through the day and turn it off at night. As far as the vacuuming question, you can use a net to get out leaves and bigger debris, but the only way to get dust and dirt off the floor is to vaccuum. Sorry.

Film on the top of the water is most likely sunscreen. Good for you for putting sunscreen on those kids!

Even though this is a small pool, you have to treat the water just like it was a big pool and keep it properly sanitized. Right now, it probably seems like a lot of trouble but after you get everything balanced initially, it won't be hard at all. Just supply us with some numbers and also tell us exaclty what all (ingredients, not just "shock") you have put in your pool and somebody here can help you.

Welcome to the forum!