Is 10 feet by 20 feet size pool good?

Answer 1

It is if if you can't fit a larger pool (or don't want one) on your property! In my opinion, larger is "better" because you have more room to swim and your pool chemistry changes slower than in a smaller pool. The downside is that you'll need more chemicals in total and pool equipment needs to be larger as the pool gets larger, so the long-term costs of ownership of a larger pool might outweigh getting one. Bottom line: If you're wet and having fun, then the pool is a good size.