Quote Originally Posted by mbar
leejp, yes shocking espeically with high ph will make metals that are not bound by sequestering agent precipitate out and stain the liner.
This IS complicated...

How long is the metal "bound" to the sequestering agent? Probably not forever, so I now have a maintenance routine for stain control unless I drain and refill ;(

What's the difference between a sequestering agent and a chelating agent?