Hazel, I wear the same bathing suits as before my surgery too. I prefer a two piece, just for convenience if I have to use the bathroom. If you're concerned about the outline of your ostomy showing, try to find a longer top with something to distract the eye, like a ruffle or large pattern in the fabric. Check out Ostomy Secrets; they have some bottoms with ruffles, but really, you can find something suitable just about anywhere. Like Puppy, I spend the summer at the cottage, so I'm either in the lake, or our pool several times a day, without problems caused by swimming. I like to have several bathing suits because I hate putting a wet one back on! If there is something specific about swimming that you want help with, let us know, and we'll do our best.