Yeah but Jorge is lazy! Dude, just take it out. Face your retuen away from where the water comes into the chamber....cut a cheap tupperware container with a hole a little bit bigger than the elbow you have on the inport of the return and stick it into the container (which will be face down on the bottom of the sump) put a rock on top of it to hold it in place and that should hold back bubbles getting there and larger items getting into the pump. I have that done and it works great for me.....plus I can put fish in there and not have to worry about them getting chopped up. I'll take a pic if you want so you can see what I'm talking about.