Buildup under waterfall

[KDee]

Hello!
With the vast knowledge contained in this forum, I am hoping someone can help me
I have all this white buildup under my pool on the tile and grout. I tried a pumice stone without much effect (granted I wasn’t scrubbing super hard). How can I clean this and what can I do to avoid it? I’m in California if that makes a difference at all.
I saw mention of muriatic (?) acid on other posts but those were more stone walls, so I wasn’t sure if the treatment would be different on tile.
TIA!

Karla

 

[Newdude]

Waterline Scale Removal - Further Reading

www.troublefreepool.com

Also let's call you @pjt because I found this below.

MaxxStrip (Kieserite) Tile Cleaning

I had my tiles blasted with MaxxStrip PF2 and wanted to share my experience. Here are the "before" pictures showing extensive calcium scale and other accumulated junk from my pre-TFP days: Here is the product. (PF2 is less aggressive, PT2 is more aggressive.) Here are pictures...

www.troublefreepool.com

 

[bradgray]

+1 on diluted muriatic. Mix it with BIODex Plaster White n Brite and it will reduce fumes and slow the run if you want to do a broadcast application and scrub it.

 

[pjt]

Looks like you're getting evaporate scale or efflorescence under your water feature. I'd start with diluted muriatic acid and work from there. Your buildup seems localized. Kieserite blasting is much more expensive and adds sulfates to your water.