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Thread: Wierd small stain on my vinyl liner in the deep end

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    Catanzaro's Avatar
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    Wierd small stain on my vinyl liner in the deep end

    I was vacuuming the pool this evening prior to the pool closing on Monday. There were a few leaves in the shallow & deep end for a few days, but nothing major. As I am vacuuming the deep end grabbing all the leaves I see something small which is not being sucked in through the vacuum, so I shut the filter off and looked closely.

    It is a small spot, maybe the size of a quarter that looks like rust, something brown (hard to tell). I grabbed my brush and brushed the area with no success. I used a flashlight and the area looks like an area in your home where the sheet rock and nail or screw start shifting, like an indent, but it is very hard to tell as I am not looking at this head on. The area is a on the wall, about 2 inches before the wall slopes down to the main drains about 2.5' below pool water.

    There are no other stains on the pool liner and very few minor dots on the steps. Originally I had the Frog system, but this only lasted about 4 months this year as my pool was opened up real early (long story). The Frog has been removed for a while and this stain was not here a few weeks ago. I am pretty good as spotting any problems.

    What could this possibly be and can I use vitamin C to remove this. I can not get my hand down there even if I lay down on the concrete. I can probably get down there with a small soft too brush. The liner is dark and I do not want to do any damage to the liner. BTW, I have tested for metals every few weeks and there is nothing lurking in the water based on the pool company results. I do my own testing and my levels have been perfect from CH, TA, CYA, PH and FC, CC and TC.

    What can I purchase and attempt to remove this before the pool is closed on Monday. Thank you.
    14,700 gallons IG Pool Vinyl Liner - Octal Circulation System
    Hayward Pro-Series 350 LB. Sand Filter Model # S270T - 2" Plumping
    Hayward CL2002 Chlorinator - Hayward Super Pump 2 HP Model # k48m2n111
    Hayward AQR9 SWG 25K Salt Cell & TF-100 Test Kit + Speed Stir
    Gulfstream HE125RA - 117K BTU Heat Pump - Date of Build is 11-2013

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    Re: Wierd small stain on my vinyl liner in the deep end

    Usually if it is removed easily with Vitamin C and is brown/rust in color it's iron. An ascorbic acid treatment followed by use of a metal sequestrant should work (see the Pool School article on metal stain removal).
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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    Re: Wierd small stain on my vinyl liner in the deep end

    Thank you CHEM GEEK. I just spoke to the Pool Company and they stated that the liner could be cut with a Toe Nail and that is what could be causing the rust. For now it looks like the stain is gone and it is extremely difficult to determine what it could be. Even though the pool will be closed today, I can peel back the winter cover and check with a flashlight to determine if there is a rip in the liner (which would mean more staining in that one spot over the next week or so). I will report back once a few weeks goes by.

    Unfortunately for the pool company then would have to send a diver out in the cold water to repair the damage before it gets worse. The warranty is for 5 years on accidental on the liner and 20 years on the liner for manufacturers defect (I could not believe the warranty either).

    Let us hope it was just a fluke stain but hard to tell. Thank you.
    14,700 gallons IG Pool Vinyl Liner - Octal Circulation System
    Hayward Pro-Series 350 LB. Sand Filter Model # S270T - 2" Plumping
    Hayward CL2002 Chlorinator - Hayward Super Pump 2 HP Model # k48m2n111
    Hayward AQR9 SWG 25K Salt Cell & TF-100 Test Kit + Speed Stir
    Gulfstream HE125RA - 117K BTU Heat Pump - Date of Build is 11-2013

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    Re: Wierd small stain on my vinyl liner in the deep end

    I took the plunge and put my head in the water and checked the area. It is a small cut in the liner. Very small (have no idea how it happened) and I am not loosing water. If I am it is so small that is it goes unnoticed. Good news is that I have a 5 year warranty with the pool company so they will be sending someone out to repair the area.
    14,700 gallons IG Pool Vinyl Liner - Octal Circulation System
    Hayward Pro-Series 350 LB. Sand Filter Model # S270T - 2" Plumping
    Hayward CL2002 Chlorinator - Hayward Super Pump 2 HP Model # k48m2n111
    Hayward AQR9 SWG 25K Salt Cell & TF-100 Test Kit + Speed Stir
    Gulfstream HE125RA - 117K BTU Heat Pump - Date of Build is 11-2013

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    Re: Wierd small stain on my vinyl liner in the deep end

    Pool company patched up the small cut with a circle patch (looks ok, but I will have to deal with it). Pool closed. I will see everyone in the spring.
    14,700 gallons IG Pool Vinyl Liner - Octal Circulation System
    Hayward Pro-Series 350 LB. Sand Filter Model # S270T - 2" Plumping
    Hayward CL2002 Chlorinator - Hayward Super Pump 2 HP Model # k48m2n111
    Hayward AQR9 SWG 25K Salt Cell & TF-100 Test Kit + Speed Stir
    Gulfstream HE125RA - 117K BTU Heat Pump - Date of Build is 11-2013

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