may sound weird, i live in the desert where its 120 degrees outside, i keep a container next to my toilet so i can check my urine to check hydration, cause it can creep up and be debilitating. any who, i noticed that at the bottom of the container where my urine had dried there where alot of crystals, looks like salt. is this a health concern and if so what can i do to fix it. i do not add salt to anything