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Thread: Salt System Just Installed -- White Film on Top Of Pool?

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    Salt System Just Installed -- White Film on Top Of Pool?

    Hey folks,

    I just a Salt System in my pool.

    Background - Pool is green. In the opening phase.

    Timeline is as follows:
    Saturday - Added 6 lbs of 100% CYA because my CYA was very low
    Sunday - Added 680 lbs of Salt
    Monday - Shock and Brush
    Tuesday Evening - Turned On Salt System For The First Time - 50% output. Replaced DE in Filter. Another Shock and Brush.
    Wednesday Morning - Pool is still green. Water Not Flowing Because Filter Pressure High (expected). Bump Filter, all is good.
    Wednesday Late Morning (shortly after) - White Film on top of pool
    Wednesday Evening - White Film Is Gone. Pool is still green, Dead Algae Floating. Water Not Flowing Because Filter Pressure High (expected). Bump Filter, all is good. Scoop Off Dead Algae
    Wednesday Evening, 15 Minutes Later - White Film Is Present.

    What is this White Film? It literally appeared within 15 minutes of when I got the water flowing again. At first I thought maybe DE, but if you lean down and listen, it's sizzling like tiny bubbles/suds. I've never had it before, but then again I've never had a salt water system before. Although, I've also never added CYA before. Compupool reads 3900 ppm for the salt. Chlorine 1 ppm, PH 7.1. Any ideas?

    See Pic.

    Thanks!

    **UPDATE** Just went out there again (so now 40 minutes after getting water flowing again) and the film is now thicker. Then I looked at the Salt Cell. The right side of it where the outlet is has a collection of suds. See the pic I attached. Although, granted, it is possible that it's just coming in from the skimmer and collecting there in the cell, rather than the cell just producing it.
    Attached Images Attached Images
    18 X 36 In-Ground Vinyl Pool, Hayward 1 HP SuperPump, Hayward SP270T 350lb Sand Filter, CompuPool CPSC48 Salt Chlorine Generator, Hayward H400FDN 400 BTU Natural Gas Heater, 2 returns, 1 skimmer, No Main Drain

  2. Back To Top    #2

    Re: Salt System Just Installed -- White Film on Top Of Pool?

    I guess the thing to know is, should I be concerned that there is something wrong with the salt system and I should possibly pursue a warranty exchange? Or is this more likely an indication of an imbalance with the chemicals? Do we all agree that it's definitely not DE?

    Once the filter pressure built up and the flow stopped, the suds disappeared within 15 minutes. But, if I bump it and get it flowing well again, they'll reappear within 15 minutes. Is 50% output too high maybe?
    18 X 36 In-Ground Vinyl Pool, Hayward 1 HP SuperPump, Hayward SP270T 350lb Sand Filter, CompuPool CPSC48 Salt Chlorine Generator, Hayward H400FDN 400 BTU Natural Gas Heater, 2 returns, 1 skimmer, No Main Drain

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    Richard320's Avatar
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    Re: Salt System Just Installed -- White Film on Top Of Pool?

    Did you ever add any algaecide? That can cause foaming.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
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    Re: Salt System Just Installed -- White Film on Top Of Pool?

    I added PolyQ back in October during the winter closing process. Nothing since though.
    18 X 36 In-Ground Vinyl Pool, Hayward 1 HP SuperPump, Hayward SP270T 350lb Sand Filter, CompuPool CPSC48 Salt Chlorine Generator, Hayward H400FDN 400 BTU Natural Gas Heater, 2 returns, 1 skimmer, No Main Drain

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    Re: Salt System Just Installed -- White Film on Top Of Pool?

    You should not have an air pocket in the cell. Is that photo with the pump running? If so, you have a flow issue and the salt system should have a warning light indicating insufficient flow. If the cell is being energized with this little amount of water in it, you've got a problem with the salt system, and a potential for damage to the cell due to excessive hydrogen gas and heat within the cell.
    Sean Assam - Sean@teamhorner.com
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    Re: Salt System Just Installed -- White Film on Top Of Pool?

    The air pocket is because this is still summer startup. My pool is green and my DE filter gets clogged quickly. I bump the filter, there's no air pocket, runs for an hour, pressure builds, water flow decreases, air pocket develops. When the air pocket gets large enough and the water flow decreases enough, the Salt system turns itself off with a light indicating not enough water present in the cell. I bump the filter or change the DE and the cycle repeats itself.

    Could the suds be due to the hydrogen gas build up maybe? I mean, I had started up the pool equipment this spring before getting the Salt System and this wasn't occurring.
    18 X 36 In-Ground Vinyl Pool, Hayward 1 HP SuperPump, Hayward SP270T 350lb Sand Filter, CompuPool CPSC48 Salt Chlorine Generator, Hayward H400FDN 400 BTU Natural Gas Heater, 2 returns, 1 skimmer, No Main Drain

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    Re: Salt System Just Installed -- White Film on Top Of Pool?

    It may be. What happens if you turn the output of the salt system to 0? See if that makes a difference. You should probably get the water cleared up and balanced prior to activating the cell again.
    Sean Assam - Sean@teamhorner.com
    National Accounts and Commercial Products Manager
    AquaCal Heat Pumps www.aquacal.com
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    Re: Salt System Just Installed -- White Film on Top Of Pool?

    I'll try when I get home tonight. My prediction is that the suds will go away. If it does, then my only hope will be that once the pool is balanced and cleared up, the problem will correct itself. I'm surprised though that this isn't a common problem. Seems like my situation would be fairly typical. I'm confused because wouldn't this happen to all owners of salt systems during spring startup? Or do salt system owners keep their system off during the spring startup?

    Thanks!
    18 X 36 In-Ground Vinyl Pool, Hayward 1 HP SuperPump, Hayward SP270T 350lb Sand Filter, CompuPool CPSC48 Salt Chlorine Generator, Hayward H400FDN 400 BTU Natural Gas Heater, 2 returns, 1 skimmer, No Main Drain

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    Re: Salt System Just Installed -- White Film on Top Of Pool?

    Hi! So the answer is yep. It's definitely the salt system that's doing it. When I got home, the salt system was off as expected because pressure was built up in the filter causing low water flow. I bumped the filter, turned it back on. Within 1-2 minutes the suds starting building up in the salt cell like you saw in the picture. I went to the pool and looked at the return lines flow. The water coming out of it was a shade of white, and the beginnings of the white film was starting on the surface. I then turned off the salt system. Within 10 seconds, the suds in the salt cell disappeared and then the returns stopped sending out white-ish water.

    So I left the salt system off. Guess I'll just give Compupool a call tomorrow and see if they think it's normal. Thanks
    18 X 36 In-Ground Vinyl Pool, Hayward 1 HP SuperPump, Hayward SP270T 350lb Sand Filter, CompuPool CPSC48 Salt Chlorine Generator, Hayward H400FDN 400 BTU Natural Gas Heater, 2 returns, 1 skimmer, No Main Drain

  10. Back To Top    #10

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    Re: Salt System Just Installed -- White Film on Top Of Pool?

    Wait until your pool is cleaned up and filtering properly. Test and adjust your water chemistry to ensure proper water balance (Saturation Index). Add any necessary salt and stabilizer, and let circulate for 24 hrs. THEN turn your salt system back on.
    Sean Assam - Sean@teamhorner.com
    National Accounts and Commercial Products Manager
    AquaCal Heat Pumps www.aquacal.com
    AutoPilot Salt Chlorine Generators www.autopilot.com

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    Re: Salt System Just Installed -- White Film on Top Of Pool?

    ^What Sean said, you need to get the pool cleaned before(prior) activating your salt system.

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    dmanb2b's Avatar
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    Re: Salt System Just Installed -- White Film on Top Of Pool?

    Not sure about the suds, but what they said...not a good idea to run the SWG while you are shocking.
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

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    Re: Salt System Just Installed -- White Film on Top Of Pool?

    Alright! Thanks everyone. Live and learn. I'll post a final update once I get the pool blue again with the outcome.
    18 X 36 In-Ground Vinyl Pool, Hayward 1 HP SuperPump, Hayward SP270T 350lb Sand Filter, CompuPool CPSC48 Salt Chlorine Generator, Hayward H400FDN 400 BTU Natural Gas Heater, 2 returns, 1 skimmer, No Main Drain

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    Mod Squad zea3's Avatar
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    Re: Salt System Just Installed -- White Film on Top Of Pool?

    Just to pile on! Normally we advise folks to turn off the SWG during the shock process. It preserves the cell by interfering with the temptation to crank production all the way up, and it prevents skewing the test results during the shock process, such as by artificially passing the overnight test.
    TFP Moderator
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    Pool-creetin's Avatar
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    Re: Salt System Just Installed -- White Film on Top Of Pool?

    Looks like sea foam. Ever go to the ocean and see it collect on shore after a storm? Thats nature taking doc's out of the water. (dissolved organic compounds) Since salt water is much better then fresh water at doing this because of its density there's a chance that it is happening here. For one i would leave the cell off till you can keep the filter running without it getting clogged. 2 I would look for a leak on the suction side. Salt water and air mixing creates sea foam.

    Not that i am an expert here i am not. Just my 2 cents.
    26x16 rockwood keyhole vynil inground, waterway cartridge filter and swg, variable speed pentair pump, extra large skimmer with 2 main drains in deep end and 2 returns,Rheem raypack 206 natural gas heater, hayward tigershark qc robot. Being installed in late may early june. Woot!

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    bobodaclown's Avatar
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    Re: Salt System Just Installed -- White Film on Top Of Pool?

    Not cool, but an interesting picture. I've got the same unit. My water was clear when I installed it. So nothing like that happened to me.
    Do you have your test numbers. Compupool tech support was good when I talked on the phone with them.
    17K Kidney Shaped Pool Concrete (Diamond Bright) Pool, 3/4 hp 2 speed 115V Sta-rite Duraglas PEA5D-180L/P2R5D-181L (Impeller C105-92PS Diffuser C1-216P), 1.5 piping, Pentair CC100 Filter , Heat Siphon 100K BTU Heat Pump Pool Heater, Flow meter Blue White Flowmeter Model No. F-30150P, Hayward Astrolight SP0581N, SWCG CalimarTitanium Edition TE45 , Dolphin Nautilus Plus with CleverClean, Lakeland Florida

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    Re: Salt System Just Installed -- White Film on Top Of Pool?

    Yeah I talked to them on the phone because I had some basic questions. They were very cool and very helpful. While I had them on the phone I described the situation with the foam and asked if that should be expected. He said yeah definitely. He said if it's low water flow with air pockets, that should be anticipated before the unit finally turns itself off (which it did). I didn't ask what it was, although I wish I had, but I bet Poolsean was onto something when he brought up the hydrogen gas. I ran some tests though because I wanted to be certain of all this. If the unit has low flow, the suds start up 100% of the time. If it's got good flow, the suds don't occur 100% of the time. So, all is good. Just trying to get rid of the green pool so that I could start using the unit.
    18 X 36 In-Ground Vinyl Pool, Hayward 1 HP SuperPump, Hayward SP270T 350lb Sand Filter, CompuPool CPSC48 Salt Chlorine Generator, Hayward H400FDN 400 BTU Natural Gas Heater, 2 returns, 1 skimmer, No Main Drain

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