Cleaning up mess previous owners left me

Fndr70

Member
May 22, 2019
22
Pennsylvania
I figured that out after the first time I did it and used a million drops :) I can see the 25ml sample would be more beneficial for doing an accurate CC count, because the multiplier is more precise, and CC has a smaller range.
 

jblizzle

Mod Squad
TFP Expert
LifeTime Supporter
May 19, 2010
42,138
Tucson, AZ
There is no need to use 25ml to read the CC. It should always be 0. If the CC is more than 1 drop using either method, it is often too much.
 

Fndr70

Member
May 22, 2019
22
Pennsylvania
I thought I read somewhere that CC was an indicator that there's still something in your pool that the FC was killing, so during SLAM if the water is still green, wouldn't I want to see CC above 0? Except for the first test after I started SLAM, when it was 1.0, it's been < .5, even 0, each test.

The pic on the left is before I drained and started SLAMing, the right is now. IMG_4438.JPG
 

mknauss

Mod Squad
TFP Expert
May 3, 2014
17,763
Laughlin, NV
Not having CC is not a big deal. They burn off with sun on the pool. And at your stage, you no longer have overwhelming organics that the chlorine is consuming.
 

Fndr70

Member
May 22, 2019
22
Pennsylvania
So 3.5 days into this, the water doesn't look as clear as I expected. It's much better, but it still has a greenish tint to it. Is this the normal progression? I've brought the FC back to shock level multiple times, and I am checking about 4 times a day.

I'm also noticing, now that I can actually see the bottom pretty well, that there is a lot of brown stain on the liner. I thought it was sand, as my vacuum has been picking up some sand, but I can't brush it off. Any ideas on how to get rid of it?
 

Fndr70

Member
May 22, 2019
22
Pennsylvania
I don't know. I have city water, that's what I filled the pool with. As far as what products were used in the past, I don't know what the previous owners did (or did not) do....

I also don't know how old the pool is or if they replaced the sand in the sand filter, so maybe I need to do that?
 

mknauss

Mod Squad
TFP Expert
May 3, 2014
17,763
Laughlin, NV
Even with city water, you can have iron. But a layer of paper towels in the skimmer basket. See if they turn brown.
 

Fndr70

Member
May 22, 2019
22
Pennsylvania
OK so I passed all the tests. The water is clear (I can see the words on my vacuum at the bottom crystal clear). I think the problem is the dirty liner....that’s what’s discoloring the water. There are brown stains all over the liner. I thought at first it was sand....my vacuum even picked up some....but if I brush it, nothing comes up so I think it’s a stain. Any way to clean this with water in it?
 

jblizzle

Mod Squad
TFP Expert
LifeTime Supporter
May 19, 2010
42,138
Tucson, AZ
Try putting a vitamin C tablet on the stain and see if the stain vanishes. That would confirm the stain being iron.
 

Fndr70

Member
May 22, 2019
22
Pennsylvania
I tried the vitamin C test. The same stain is in the side so I just reached in and scrubbed.....didn’t do anything. Here’s a decent picture of what it looks like34796CDE-1370-4A68-8A3F-FB70EB081760.jpeg
 

mknauss

Mod Squad
TFP Expert
May 3, 2014
17,763
Laughlin, NV
Rough would be calcium scale with algae/metals/dirt embedded in it. Smooth would imply copper staining as you have tested for iron.
 

Fndr70

Member
May 22, 2019
22
Pennsylvania
Yes, the products was originally using (the clorox brand) all has 'Blue' in their name.

Plus the previous owners could have used something like that as well. The stain has been there since I was able to see the bottom, so I don't know how long it's been there.
 

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