I recently found this site (already ordered and received the TF-100 testing kit), and I could use some help and advise.
We've just had our pool redone with StoneScapes Mini Pebble. PB had to come back, drain the pool and do another acid wash as there was quite a bit of mottling on the bottom and sides. I noticed water spots under the (new) tiles. Is this something to be concerned about. They are coming to fill it tomorrow, for the second time, and I'd hate to have this be a major problem and not get it taken care of before filling.