/diy/ - Do It Yourself

I’m a first time homeowner of a home out in a rural setting with well water. I had the well water and potable drinking water tested with the closing and it all checked out great, but pic related is what the brine tank looks like on the salt water filtration system. It’s a fairly new system, seller said about 2 years old. He also said everything was fine with how it looked, and the water in the little test capsule is clear as can be. Anyone here familiar with these systems? Should I be concerned about the dirt/gray coloring in the saline tank?