Waterbear...thanks for your post.

Stain color is light brown...stainaway product works great...but stains come back after a few days.

Chlorine readings were my best guess looking at the color code. The walmart test uses the color after the first 10 seconds as the FC and then after 2 minutes they use that color as TC. Their directions not mine.

I use the tablets for chlorine...I think it is stablized. Will check tomorrow.

Will get water test for metals tomorrow.

Ron.