Pool start-up questions

wkussmaul

Gold Supporter
LifeTime Supporter
Aug 29, 2010
45
#1
Hello TFP gurus,
Just opened the pool 2 weeks ago. When it went to bed, BBB-method chem was perfect. Safety cover on all winter.
Upon removing cover, not too bad looking, and what there was cleaned up quickly after shock and vacuum.
However:

(1) the initial pH was very alkaline; alkalinity was 180-190; and there was a deposit of whitish crystals which the robot picked up for about a week.
I gradually added acid (~5 gallons over the 2 weeks) and the pH is now 7.3-7.4 and TA down to 85.
What was that white stuff? Do I have a potential plaster problem?

(2) Current chemistries (via Color-Q, which I love compared to sticks):
FCL 0.82
TCL 1.10
pH 7.4
TA 85
CH 184
CYA 53
So I added bleach, of course; but do you think I ought to bump up the hardness a little?

Thanks as always.
 

JasonLion

TFP Expert
Platinum Supporter
LifeTime Supporter
May 7, 2007
37,879
Silver Spring, MD
#4
They were some variation on calcium scaling, but with something else crystalizing with the calcium causing it to form crystals instead of scale.