I am in the process of leveling a spot for a 18'x48" metal frame pool. Before I proceed any further, I am hoping to receive some feedback for the following questions:

Any benefits/issues in using 2" blocks under each leg?

Would you recommend adding some sand under the base of the pool (not under the legs) to make the bottom a little softer and then setting the tarp on top of the sand?

I am looking into the chlorine generator for this pool and trying to weigh the costs and benefits. Has anyone ever used one for this type of pool before? Will I still need to use other chemicals besides chlorine?

This will be our first pool and the intent is to move to a permanent above ground pool in a few years or so once the kids are older. Any comments or words of wisdom is greatly appreciated.