Brown spots bottom of pool.

TitanFlorida · Oct 18, 2015

Hello TFP,
I am happy to have someone give me great advice!

Problem I have is a massive probably 60 or so brown spots on the bottom of my IG pool and some on the steps. I had some old vitamin C tabs so I crushed them and placed it on a brown spot on the step. It didn't change the color.

A Pool guy said it is the iron bleeding up from the rebar. I won't get into what he told me to do!

Then someone else should drain the pool and grind out those spots and then put in the new diamond bright? HELP!

I have other photos also

kimkats · Oct 18, 2015

So have you felt them with your fingers? does it feel like there is missing plaster there? any pitting? still smooth?

Kim

TitanFlorida · Oct 26, 2015

Hello Kim,
Thanks for the reply!! I tried to put Vit C on the spots but it did not lighten them. They don't feel pitted. Should I have posted this somewhere else? I am new to this site.

kimkats · Oct 26, 2015

Your next "test" is to put a chlorine puck on them and let us know what that does. We will go from there.

Kim

borjis · Oct 26, 2015

If it's from rebar protruding through or just underneath then it's rust.

kimkats · Oct 26, 2015

If it were rust the Vit. C should have done something to it right?????????

Kim

borjis · Oct 26, 2015

I know it would if it was a metal stain...I don't think it would work on Rust but not 100% sure.

wjr75 · Oct 26, 2015

May be some metal in the stone pebbles. I have a couple in a new pebble sheen finish that I need to address next spring.

TitanFlorida · Oct 29, 2015

Here is what I am thinking!

1) I need to rework my waterfall and fix some of the leaks were the fiber optic lights are then re-color it with Portland cement and color.
2) I need to remove the remaining tile grout above the tile which is chipping off. Last time I had the pool refinished the pool guy left a grout line of 3/4"
3) I found 1/2" Thin tile which I want to put in there then re grout.

Since I need to drain the pool to do the tile.
Should I grind out the brown spots and add new diamond Brite?
Then Acid wash the entire pool with Muriatic Acid (50% MA and 50% Water)?