Hi Guys, my pool is also spotted and very rough, look like the pic in http://www.troublefreepool.com/white...ol-t58275.html but severe, my pool man did not do a good job.
Two year old grey bottom, 25000 gallon, with a large bench.
p.s. i used a 2" steel flat edge and scraped the stuff off the plaster and it was smooth under, the stuf felt like sharp sand.
I have three kids that rubbed their feet raw and figured it was this .... can i drain pol and grind off with by sanding? appreciate your expertise and input