Just started a new 350 gallon spa.
Ph was high, 8.2 brought it down to 7.2
Alk was at 80 holding strong.
Added my Chlorine and I was at a 2 - 3
Went to bed, and this morning I woke up to a brown/yellow spa with a ring of what looks like a rust colored dirt.
Whipped that off and took a water...