Pool start-up questions


Gold Supporter
LifeTime Supporter
Aug 29, 2010
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.

(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.


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