Black oily film

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New swimming pool owner's questions.
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Pool Newbie
Pool Newbie
Posts: 1
Joined: Sun 07 Aug, 2011 05:46
My Pool: 18x36 in ground, DE, Clorine Hayward pump
Location: NY

Black oily film

Postby reidsmith » Sun 07 Aug, 2011 05:56

Why is there a black oily film on my scum ball in skimmer?

TSH Tech

Black oily film

Postby TSH Tech » Tue 09 Aug, 2011 23:40

It's ok, your scum ball is doing what it's supposed to do. It's telling you a new scum ball should be added to the skimmer.

Black oily film

Postby Guest » Wed 10 Aug, 2011 17:24

I have done that. My question is what my be causing it?
TSH Tech

Black oily film

Postby TSH Tech » Wed 10 Aug, 2011 21:56

Could be a host of reasons;

- Suntan oils
- Hair spray products, gels, etc.
- Tree sap, leaf oils
- Pump seal is leaching petroleum
- Overnight spraying of pesticides
- Smoke/ash from somewhere has settled into the pool
- wild animal taking a dip into the pool
pools just don't develop a oily dark film out of nowhere, something is depositing into the pool. Very difficult to diagnose over the internet.

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