Cal Hypo damage

RebelBob

Well-known member
Jun 7, 2018
67
Virginia
I added a pound of cal hypo last night by sprinkling it around and this is what I have this AM. I guess my mistake was doing some in the shallow end. Thoughts on how to repair? Pool putty?
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JamesW

TFP Expert
Mar 2, 2011
21,129
Try putting vitamin c on a spot.

Thoroughly brush the pool to get any remaining calcium hypochlorite off the floor.
 

Rocco

Well-known member
Dec 23, 2012
262
Manassas Park, VA
It appears to be the same exact thing that happen to me before I joined TFP. In my case it was the chlorine (I was using PowerPowder Plus) and copper in the plaster/water reacting and creating a dark purple/blue stain on the floor of the pool.

Eventually it would fade after a day or two.

Do you know if you have been using an algaecide? My mistake was using the start up and closing kits from the pool store which contained algaecide with copper.
 
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RebelBob

Well-known member
Jun 7, 2018
67
Virginia
No Algecides...just liquid chlorine. And only this one bag of CaL Hypo by HTH last night. Tried brushing but no luck. Will try some vitamin C, but I was not aware that shock could add iron?
 

JamesW

TFP Expert
Mar 2, 2011
21,129
I suspect that the stains might be copper. Vitamin C will usually show a change in the stain. The stain might get worse or better.
 

RebelBob

Well-known member
Jun 7, 2018
67
Virginia
Thank you @JamesW! Got the grandchildren in there this afternoon with a sock full of vitamin C and they cleaned it right up. The HTH shock said it prevents algae, which I assumed was from the cal hypo as they only list cal hypo in the ingredients. So there must be an algaecide in the “other ingredients”.
 
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RebelBob

Well-known member
Jun 7, 2018
67
Virginia
Actually only reason I had it was that back in Feb/March. I started worrying about where I was going to be able to get bleach due to the virus. So I bought some figuring it would be better than using pucks. Turned out I was right about the bleach but I was able to get along with liquid chlorine from Lowe's instead. Thought I would just try one bag to reduce amount of chlorine needed. Lesson learned!