Clorox Calcium Hardness Increaser - Staining?

JJ_Tex

Bronze Supporter
Jul 17, 2019
977
Prosper, TX (DFW)
So my calcium has always been a bit low and I have just managed CSI by letting the pH be a bit on the high end of 7.8 or so.

With the new PoolMath update, it kept telling me my calcium was low (200) so when I was at Lowes this weekend I picked up a bag of calcium hardness increaser. It was made by Clorox, which I have read bad things about some of their pool products, but that was my only choice and I thought calcium was calcium.

I put half the 5lb bag in the deep end and brushed a bit, seemed pretty easy. This morning there are several rusty spots by the drain. WTH. I brushed again and that didnt seem to work so I have the robot working now. The spots are small and look like a handful of the granuals rusted, similar to what iron fertilizer pellets do to your sidewalk.

Has anyone run into this and have thoughts on what I should do? Until then, I'm avoiding all Clorox products, especially for the pool %*#$#&$!
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
16,228
Northern NJ
I would put some craushed vitamin C tablets wraped in a light cloth and duct tape it to the end of a pool pole and hold it down over the stain. Maybe weight the cloth bag a bit. You just want concentrated ascorbic acid water on and around the stains.
 

JJ_Tex

Bronze Supporter
Jul 17, 2019
977
Prosper, TX (DFW)
I didnt have any vitamin C, and the wife forgot to grab some in her store outing yesterday. My turn is next, so I'll make sure and grab it.
I was hoping the spot would magically go away, but its still there. Below you can see the beautiful TFP water that is crystal clear, even at 6ft deep, and then this stupid rust spot.

Moral of the story, don't ever use Chlorox products in your pool. Not their bleach, their pool salt, their calcium increaser for pools, etc. I even updated my signature to make me feel better :)

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