Howdy folks. My wife and I just bought a new house back in June and are now the owners of a pool. I've been doing quite a bit of reading on the forums here, but still have several questions. Per the guidance on posting etiquette, I won't post all of the questions at the moment.
The previous owner subscribed to the "Do what Leslie's tells me to" method of pool care. He used pucks for chlorination and threw all kinds of chemicals at the pool (algaecide, phosfree, etc.). For the first two months after we moved in, we hired a pool service since I simply didn't have the time or wherewithal to deal with the pool. Once I got my feet under me, I've been using the TFP recommended water maintenance merthods with 8.25% bleach for my chlorine source and muriatic acid as needed.
I should also note that I have two large Live Oak trees on either side of pool which contribute a lot of biological matter to the pool. Acorns by the hundreds at the moment.
My post pressing question is with regards to this sand/salt-like substance I keep finding in my Polaris filter bag. It's clear like salt, but has a consistency like sand (doesn't taste like salt either ). There's also some blue specks in it that seemingly resemble the blue specks in the plaster. I'm worried that somehow my plaster is coming apart/failing.
I also have a few spots on the walls that are kind of yellowish with kind of a white halo around them. I'm pretty sure it's not mustard algae since it doesn't brush off. I tried taking a picture of one, but it didn't come out particularly clear. Look below the water jet.
Does anyone have any idea what these might be?
Here are my latest water readings. My numbers are rather consistent from test-to-test and I'm shooting for FC=12 due to my currently high CYA:
FC = 10
CC = 0.5
PH = 7.5
TA = 110
CH = 525
CYA = 100
My other questions have to do with plumbing and pool covers which I'll ask subsequntly.
Thanks in advance for any advice!