I was doing my weekly chemistry check on the pool and decided to do a CYA test again just for fun (I've only done the one before, Taylor gives you enough reagents to do 20,000 CH tests but EIGHT CYA tests, go figure) and doing the dilution trick netted me a result of 150. It's not causing problems with the weather this cold, but everything I read here says it WILL become a giant headache sometime later in the summer unless I am constantly pumping it full of bleach daily, so I figured I'd better just bite the bullet and do a partial drain and refill.
So while I'm draining the pool (with a garden hose, it's slow but it's a neat/free trick) I've noticed the plaster looks...I don't know honestly. Weird to me, at least. I've always thought there were stains on the pool floor and wall from somebody screwing up with copper algaecides or something like that, but it's not stains, the plaster is white with large patches of greyish-yellow looking material mixed in. One of my pain points about this pool is that the prior owner was unable to give a definitive answer as to when it was last replastered, and it's NOT a job I want to have to be dealing with this summer, so when he finally gave an answer of like "Hmmm...maybe 5 years ago?" I figured I still had awhile to not worry.
So do any of you experts want to weigh in on what I'm seeing here? Is this normal? Is the plaster basically gone and I'm seeing the underlaying concrete starting to poke through? Or was it just plastered badly in the first place? It's not cracking, the pool floor feels soft enough (My understanding is that one of plaster's jobs is to feel nice on the feet and hands) and I'm not having any issues with leaks or anything. Maybe this is just the way plaster looks? Any input is appreciated!
http://img.photobucket.com/albums/v517/ ... AG0137.jpg
http://img.photobucket.com/albums/v517/ ... AG0136.jpg
http://img.photobucket.com/albums/v517/ ... AG0135.jpg
http://img.photobucket.com/albums/v517/ ... AG0134.jpg
http://img.photobucket.com/albums/v517/ ... AG0133.jpg