We are replacing a 30 foot round pool that had one center drain and one return. We get a lot leaves in our pool and often make a whirlpool and use the center drain for the leaves to collect there and then we can easily remove them. One pool company told us that state law (Indiana) now requires that we have 2 center drains. He also suggests that we have two returns. If we get the two center drains put in, will our whirlpool system still work for getting the leaves out? Also, do you think two returns is a good idea with only one skimmer, if we go with either the one or two center drains? Thanks