I pour directly into the skimmer. If you don't have a skimmer, pouring slowly into the return jet flow, or little all around the pool both will be fine. Our Intex liner DID bleach out some in one spot when my son poured 2 gallons of bleach all in one spot, as fast as it would pour. I'd recommend doing something to ensure that the bleach is dispersed somewhat rather than pouring in a concentrated area.

Pappy