Could this be done with a small 15' Dolphino pool also?

I'm just trying to get the pool as inviting as possible for the kids and wife. I already replaced the pump filter (junk) with a used Hayward pump and sand filter and besides a small bromine mistake the pool is crystal clear.

Just wondering if the same advantages would apply to a AG 6000 gallon pool and if anyone had an approx ammount needed. Perhaps I'll just go grab a bag and start with that and adjust as many have stated.

thx in advance.