Bubble Counter Fluid and Diffuser Contamination

tackful

AC Members
Mar 15, 2007
649
11
18
Sausalito, CA
Numerous diffuser manufacturers warn against using anything other than water in a bubble counter in order to avoid diffuser "contamination". Not sure what they mean by this. Blockage? Bacteria? Anyone know?
Frank
 
In case the liquid ends up in your aquarium... The bubbles can force the fluid up into the tubing and then into aquarium water,
 
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