A chunk of sodium bicarbonate, Clorox alkalinity up sat on pool floor

[Kjh2023]

Hoping for advice that will calm me down. Was pouring sodium bicarbonate in pool. There was a clap of thunder and I ran in. Didn’t realize a chunk went to the bottom and sat there overnight. It crept down towards the drains and when I saw it and brushed it this morning there is a large white or light colored area on the pool floor. The walls and floor are a mini pebble, darker plaster. Did I just totally screw up my pool? Was the surface “bleached” in a sense. Any advice would be appreciated. Thanks.

 

[JamesW]

Can you show the box?

Did you add anything else yesterday?

 

[Kjh2023]

I added a phosphate reducer (liquid) as phosphates were high. Prior to adding the alkalinity increaser (powder). Overall the surface is fine, it’s just where the clump sat. I added images of product directions. I called Clorox and they said a stain remover would take it out, but I didn’t feel real confident with the support person. I have scrubbed with brush, albeit the pool is 9 feet deep.

 

[JamesW]

The baking soda (alkalinity increaser) would have been fine on it's own, but the addition of the Lanthanum chloride created a problem by making lanthanum carbonate.

What are all of the chemistry readings now?

 

[Kjh2023]

I’ll have to do readings tomorrow. Actually having my pool guy come out as I have been having a heater issue so will have them do the readings. When it rains it pours. Not sure what the consequences are for what I did.