Help, large Calcium spots keep appearing and growing.

Rokihunter

Bronze Supporter
May 20, 2016
73
North Augusta, SC
I have a 15,000 gal SWG pool that was built early 2017. Besides the initial start up I only add acid and liquid bleach in the colder months. I use the TFP kit to test my chemicals.

Current readings.
FC 4
CC .5
CH 400
TA 80
And PH likes to stay around 7.8

How do I get rid of these spots and do I need to lower my CH?

FB6DBE46-DEF0-464D-B94C-BE729FB05349.jpeg00BD48B7-39D5-4E9A-A961-C3D7AB4FBF36.jpegA0B387CC-EA2D-4652-B4C0-D7F33F0CB474.jpeg
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
23,019
Laughlin, NV
Those look like calcium nodules. Are they raised up from the surface of the pool?

Do a Search for Calcium Nodules. Review those threads and see if what you have is similar.
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
11,740
Northern NJ

 
  • Like
Reactions: Rokihunter