I have a euro reef rs100 skimmer w/sedra3500 pump in sump its in 11inch of water the instruction manual says 6 to 8 inches of water. Yesterday raised it to 7 inches of water and the chamber in the skimmer wasint filling up with water. So had to put it back down on the floor of the sump which is 1 1 inches of water. Why not working when raised up to proper specs? Need input thanks guys.