If you are using tap water and there is an aerator on the faucet, the chlorine will dissipate. That's the primary purpose of the aerator. Higher concerns are when municipal water companies use bonding agents that keep the chlorine bonded to the water.
I use Novaqua and have no problem with the skimmer. I also use either filtered water or distilled for the reasons mentioned above. I would buy RO if I could actually find someone in this area that sold it.