New Bubbler decor

PhillyIn06

AC Members
Aug 12, 2006
54
0
0
Just bought some new decor along with a master test kit today.

Onto the point, Its a skull with a little hole in the mouth for what I thought was one of those bubbler rocks bt apparently I don't know how to use them because I put it in and no bubbles...What am I doing wrong?
 
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