Water problems in small, small pool

[PoolDoc]

Here's one option:

Super-simple-pool-chemistry-recipe-for-Intex-type-pools-start-up-amp-routine-care.

EDITED TO REFLECT WATERMOM'S POST BELOW.

Recipe above applies only if you drain and refill. I misunderstood, thinking that you'd already decided to do so. For an 1800 gallon pool, that's what I'd recommend. It's not worth saving the water, for the amount of tweaking you'll have to do.