1 of 2 working. Works well (as in the 1st photo). The other pushes large bubbles out of a small area of stone - unevenly distributed and makes a loud gurgle, something is wrong with the airflow. No, this is not my pump as I tried the defective one with two different pumps in two different pools. So my ONE replacement arrived and it's broken - the stone itself has a long thin piece of plastic/strip that's partially torn off AND the opening where the plastic tube coming from the air pump is supposed to go is completely broken. So I'm going again. I need to request another replacement.
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