I just finished installing my 21 round Saltwater 8000 and seems to be working fine. My salt generator and water pump on timer circulating the water through sand filter. My only problem is in last few days my water is going down close to below skimmer level. I ordered potable water for the 10,000 gallon pool. Would it be all right to use some well water to get the level up to half mark of skimmer? It has some iron in it...not sure about other minerals. All I need is about 1-2 inches to get it to the mark.