Scum on CO2 tube

johnstires

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Aug 10, 2003
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Not sure if this is a typical thing, but I have noticed that there is a slimy, snotty scum that has formed around my CO2 output tube. It's not hindering my CO2 flow, I was just wondering what it might be. I have a hagen CO2 setup and the tank is about 2 weeks old.
 
I get that sludge too. Is this the kind of algae that tank cleaners love? Would it be OK to scrape it off and leave it in the tank for them?
 
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