free, That's what I've been saying all along. Personally I think the "expert" is scamming. Maybe Pebble Tec wouldn't have him as an applicator? He got very defensive with me on another thread when I suggested he had an agenda. Here is a link that might be useful: I will answer pool plaster questions

Ooops I just found it! Here it is for others to see: Cat 1 PebbleTec Carribbean Blue Majestic Plum Sandy Beach Sedona Red Tahoe Blue White Pearl PebbleSheen Aqua Blue Blue Granite French Grey Desert Gold White Diamonds Cat 2 PebbleTec Black Pearl Black Marble Blue Lagoon Creme de Menthe Jade Moonlight Grey Soft White PebbleSheen Arctic White Black Onyx Bordeaux Irish Mist Seafoam Green Slate Blue Cat. 3 PebbleTec Midnight Blue Tropical Breeze PebbleSheen Ocean Blue Prism Blue Turtle Bay

If your 2 LED lights aim head on at each other from opposite sides of the 40' runout it won't be to bad, it'll be about equal to 2 300's. If your aiming them across the short sides you should use 3. One at the 1/4, one at the 1/2, and one at the 3/4 mark. Don't use 100 or 300 lights in the pool area at all. Use 2 500's aiming from opposite ends across the 40' runout, these will be much better than 2 300's and the LED's too. See ya, Kelly

I know this is an old post, but I am having a similar issue with same pebble plaster pictured in the original post except mine is already 12 years old. This year, I had the pool acid washed. The acid was diluted propery from what I know. The pitting isn't really terrible, a lot of pebbles come loose apparently when you acid wash, but the discoloration started to appear mainly in two small areas over the course of the season. I have never had a plaster issue before. My pool guy insists that it's not the acid wash - and maybe he's 100% correct - but I have no other explanation. Yet. I bought an underwater camera but haven't yet developed the film. In the meantime, can any of you here shed light on acid washing pebble plaster. I've read a lot of posts where pool experts warn against it. My pool guy assures me that it's a lot of chatter, and, that done right, acid washing pebble is fine. I treasure this guy, he's hard working and honest. It's not a good spot to be in. I just want to figure out what is going on.