I have been doing pools a lot of years and have come to work with a company that just installs pebble tech surfaces. And as a tech and have been through the staining in diamond brite. I find this surface to be far superior to Quartz, Marcite, Fiberglass and Vinyl Pools. These are the edge pools. They look nice and can make the value of your house increase.
But the issues that I see here are chemical, or improper maintence and maybe just not enough known about the positives of these surfaces.
Salt and pebble tec is ideal, Salt generators produce chlorine gas. Chlorine gas is a lighter abrasive.
Proper Brushing which should have been a first hand religious exp. the first year of install.
Do you know that Pebble Tec pools are only warrented by a running time of 10 hours?
There is a reason for that all those rough edges. Think about it if a stream runs over the top of rocks they become soft and sometimes slippery.
But if water just passes over the top peridically they become rough.( Especially if chemicals just sit on the surface and are not moved around by a good brushing)
Circulation, is the key here.
Another thing is chemicals
With what I have been through
1-3 on chlorine in the winter
2-4 in the summer
Bump your salt genrators to 70-100 percent depending on what amount of usage your pool gets. In the summer (Winter keep it at 20-35%)
PH hmm I hear 7.4 and I guess its a reccomendation. I prefer 7.2 but you have to be careful and maintain your alk level after it rains. And if you have a gas heater.
Alk in these pools can safely be maintained at 80-100
And when it hits 80, I add 3 pounds mixed with water around the best part of circulation in the pool.
And I hear a lot about stains,
One stain I have not seen here is the dreaded cauliflower stain that starts at the main drain and then blossoms out all over the pool.
That is a stain from fertilizer.
High chlorine readings produce a scale of white icycles.
Plants fertilized can cause overspray and can and will end up in your pool.
Metal test are a fact when you have high iron,copper,magnesiem.
etc. Im not a great speller but I do know pools.
Less is more with pebble tech surfaces.