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					Originally Posted by andestang  You see the water level in the neck going up and down and you can also hear it  from the pump. | 
	
 Mine was doing that. Goes up down n super hard to fine tune. Even adjusting the tuner by a hair line will cause huge fluctuations in skimmer lvl. Found out that my pump was not in straight it was a lil crooked.  It now doesn't fluctuate by tuning it is so hard. Is this normal for vertex IN series? Litterly 1 hair turns makes it either g half way down in bubbles or super overflowing