Things got worse so I thought that I'd throw on the scuba gear and see what I could do to remove the build up. With a special hand filed and edged scraper I went down and commenced to scrape. Over a few days I burned up four tanks of air and accomplished getting the steps scraped. Total hours probably about three and a half. I did not get much enjoyment out of scraping each little one inch square tile one at a time but the results were great. However it wasn't something that I wanted to continue with.
For a while I tried various things on the tiles at the water line including using what I was told was pretty strong acid with little or no results.
Then as luck would have it I was over at our friend's Jim and Marianne's house and they had just had their tiles at the water line cleaned. Jim said it was pretty fast and easy and Javier always did a great job. I was introduced to Javier and I asked if he could clean the sarro off of the tiles in my pool. He said yes, gave me his phone number and I said that I'd call.
I knew that I'd have to drain my pool and that kept me from calling for many months. Sometime in the past I had been told that there was a possibility that when a tiled pool is drained and when the tiles dry out they might start coming loose. I was fearful of that happening but the sarro had finally gotten so bad that I got to the point that I was willing to risk it.
So I made the call, well, as usual when I need to call someone that speaks Spanish Debi has to do the talking.
Javier came by on Friday and looked at the pool which was still filled with water (40,000 liters) and said he would come back on Monday and clean the pool. Cost:400pesos.
He said that I needed to go to Barroso and get twenty liters of industrial acid. Since I get most of my pool supplies from Hidromechanico I asked if I could get it there. He said no that it had to come from Barroso.
I asked when he would arrive on Monday and he said he would arrive at 11 and work for about two hours and then go eat and then return and finish around 2.
Oh, and the pool needed to be empty. I kind of figured that but it was nice of him to remind me.
I said ok and the deal was made.
They used their broom to move the acid around on the walls and floor after the initial impact of the acid had done its thing.
The amount of bubbling and off gasing from the interaction between the acid and the sarro was overwhelming. The acid bubbled streams of blues and greens and the vapor steam rolled into the air. Javier's guys were prepared for this and as the vapors became overwhelming they puller the necks of their t-shirts up over their noses.
The bucket of water was used to stand in to remove the acid from their feet, ankles, calves, wash off their coke bottles and their hands periodically.