9001 skimmer foaming up the sides

[mlivvy]

My tunze 9001 skimmer is foaming alot on both sides and behind the collection cup. Is this normal?

 

[rvitko]

The back is normal, but the sides is not. How is the pump oriented? It can be installed in all 4 positions. Do you have the air closed at all? Is the flow deflector installed on the bottom and are you using a bubble trap sponge?

 

[mlivvy]

The back is normal, but the sides is not. How is the pump oriented? It can be installed in all 4 positions. Do you have the air closed at all? Is the flow deflector installed on the bottom and are you using a bubble trap sponge?

Hi rvitko thanks for the reply. The pump was facing the bubble trap but I switched it on 3 sides and it's still foaming and now alot more. I've closed and opened the air. Still foaming. The flow deflector is installed an with the sponge.

 

[rvitko]

The bubbles would be the least in the stock configuration, pump facing the output deflector. Does the pump happen to have a rectangular hole on the bottom, roughly 1/4" wide and 1.5" long? There was a cap in that hole that said Tunze, the cap might have fallen off.