Rough, sandy stuff on my liner

[Pamsel]

Hi there, Waste & Janet,
Yes, a damsel in disress again! Thank you both for your kind assistance. I'm sorry, I should have known to post my numbers.

CL - 6
FC - <1
PH - 7.5
TA- 160
I'm sorry but I don't have a Calcium number. I will do that this evening.

My husband happened to meet a man over the weekend who is the pool maintenance man for several country clubs in the area. He said it's iron from our water and that I need to be using a "stain ban" type of product. Actually, I have used that in the past but last year when I found this forum, I stopped using everything from the pool store! I used a "stain magnet" last night which is supposed to pull off what's settled on the floor and sides of the pool. (This is what this pool maintenance guy said I need to use.) So far, it doesn't seem to have done a lot, but it's extremely windy and I don't have a real clear view of the floor, due to the water being rippled by the wind.

I'll get my numbers again this evening, including calcium and will post them.
Thanks for being willing to help me out again. Other than the stains, the pool looks beautiful with crystal clear water! That's thanks to this forum, completely!

[Watermom]

Your chlorine numbers don't appear to be accurate. FC + CC = TC always. When you say CL, what do you mean? TC? If it is your TC reading, I doubt you have a combined chlorine (CC) reading of 5. We also need a CYA reading. Retest and repost those numbers and somebody here can help further.

[Pamsel]

Oh, Watermom, you're right - I was in a hurry and posted inaccurately. Thanks! I just had seen the responses from over the weekend and was hurrying off to someone waiting for me and wanting to get a reply done before I ran off again. The correct numbers were FC 6 and CC <1

Here's my numbers tonight:

CL 0 - this is because I had to let it drop below 2ppm yesterday before adding the "Stain Magnet" last night.
TA 140
CAL 180
PH 7.5 - I had also dropped this to 7.2 yesterday, but it's back up to 7.5 tonight
CYA 36

Hope this helps to figure things out. Thanks!