RK2 Water flow, water level, and air flow checks.

1) Air flow meter: should read between 10 and 15. Note the bubble should be bobbing up and down slightly. If it is not, it is probably stuck and not reading correctly.

2) Water level. This water should approximately even with the bottom of the clear top part of the skimmer, plus or minus 2 inches.

3) Water flow. Should read between 20 and 40. See following closeup picture for more detail.