I just bought an inground pool, kidney shaped, I would post a link to it but not sure if it is allowed. Anyway, it is 28' x 16' and 4' deep. It has one skimmer, and one return line. I was wondering if that is enough for this pool. This pool is about 350 sqft, and I've read that one skimmer is per 500 sqft is enough. Not sure if one return line is enough, and/or if I would benefit from one or two extra return lines. There is no main drain also.