So I'm pretty sure I know what's happening. I did the ascorbic acid treatment in my pool about a month ago because my steps were yellowed. I followed all the steps, except the part where I add sequestrant. After I started adding chlorine, the water turned a pale green. I assumed it was causing the metal in the water to precipitate out after mixing with the chlorine. On 2-15-16, I bought $50 worth of sequestrant and the green cleared up. Last week, I started checking my levels in advance of prepping the pool for open toward the end of next month. My initial readings were:
I have since added about 6 lbs. of CYA to bring that level up, about 8 lbs. of baking soda so that my TA is around 65-70 right now, and about 2.5 gallons of chlorine spread out over the week. This morning, I noticed the deep end is greenish. After getting home from work, the pool is now pale green again. I assume I can dump more money into sequestrant, but what would happen if I did nothing? Wouldn't the stairs just yellow again? The pool looked great last season except for the yellow stairs. If I'm gonna have to spend an extra $100 or so a month on sequestrant, I'd rather just have yellow stairs. On that topic, do those CuLator packets really work?