I have a new 27' above ground pool. I filled it to just about half way up the skimmer. We have had rain the past few days and the water is now nearing the top of the skimmer. Do I need to drain some water out? If so how? I have a cartridge filter so there is no backwashing like a sand filter. There is a drain plug in the filter but that will just dump water out right by the pool. Is my best option to use a sump pump or just wait for us to splash it out and have the sun evaporate it?