I’m getting ready for my first spring pool opening. The pool has a main drain, a skimmer and 3 returns (actually 4, but one is plugged, I assume there was a problem with it). The previous owner of the pool only had a skimmer intake open. One of the reasons is that he used to put trichlor pucks in the skimmer basket and I'm speculating that he didn’t get enough flow if both skimmer and main drain were open.
Since I’m not going to have any pucks in the skimmer, I was wondering if I should have both skimmer and main drain open? I understand that having some water going thru skimmer will help to get floating stuff off of the surface, but my thinking is that main drain intake will be much better for circulation.
I would imagine that skimmer only intake would result in some stagnation of the deeper layers of water. Using main drain only would ensure the best turnover and circulation. If I don’t get much trash in the water, is it ok to use only main drain?