Hey there. I was using a nature two after being told that my above ground pool, because of the metal, salt would cause corrosion and that you could keep your chlorine at .5 parts per million rather than a higher level with nature 2 or salt. I hear that it can cause staining but my main question is it true that you can use less chlorine with salt or a nature two or not? Also is it true that you don't need to use a salt generator with an above ground pool? I would love to use less chlorine if at all possible though I know you need some level of chlorine regardless of your system