Quote Originally Posted by Bnelson View Post
Im thinking since I drained pool and refilled, the new water had some metal in it.
Alot of the mustard algae is gone. Finally.

Temp was 80. back to 74 this morning.
readings from last night are from a pool store. Ran out of CYA agent.
CYA 27
TC 6.5
FC 6.1
PH 8
Adj Total Alk 148
Hardness 252
IF these numbers are right (and let's assume they are ballpark) then you need to lower your pH to the 7.2-7.3 range and shock the heck out of it. At 8.0, your chlorine has lost most of it's effectiveness, and your TRUE T/A is lower.

Start there and see if that helps. Shock to 15ppm.

That's my best guess for where to begin.