Thanks Dave, I do have a skimmer but its not working properly with my lighting system going to get a newer one today, The film you see at the top is mostly salt for some reason I have water that runs down the front or the sides, I don't over fill the tank it seems to just be build up on the plastic then flows down. I realize that no water should be leaking or running out the sides or front but hasn't been to much of a problem seems like basic cleaning usually helps. but the salt is getting harder to clean from the tank.