Talk of The Villages Florida - View Single Post - Zooglea Blocking Drain Line on AC
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Old 09-19-2025, 07:58 AM
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Quote:
Originally Posted by Altavia View Post
The white, slimy, snot like stuff that forms if you don't regularly flush the system is Zoogloea bacteria.

https://youtu.be/5VOffWjmWkk

It became a problem when HVAC systems switched from copper to aluminum. Very low concentrations of copper ions deactivate the bacteria preventing the build up.

Some of the tablets (if blue) used to prevent HVAC Zoogloea build up contain copper sulfate.
Good information, Thanks. This drain snot problem very well might apply to us since we have a new HVAC system that’s less than a year old. I’m going to do some investigating to see if our new system has aluminum condenser coils and take appropriate preventative measures if so. It’s troublesome how changes to technology can have negative ripple effects, like adding ethanol to gasoline, or changing from using copper to aluminum for an HVAC systems condenser coils.