I purchased some premixed salt a couple days ago from about fish. Today I went to do a water change and luckily I noticed how brown and disgusting this water was before I poured it in my tank. I tested the water and it had nitrates in it. They store their premixed in glass tanks in the back of the store. I called him and he denied all my claims but admitted to never checking his water with a TDS meter. I absolutely will never step foot in that store again and I recommend that no body buys water here.