Anyone else have problems with which way the pump should face? I am having a hard time with it. There is yucky stuff on the top of the water and it isn't being filtered from the top of the filter.
And why do they have a slit in on the inside of the tank near the middle?
I just jammed the pump all the way to the bottom of the compartment with the suction cups attached to the bottom of the tank. I have the wire coming out of the pump along the side of the tank where the arm of the light is attached.
I'm assuming the slit on the inside of the tank near the middle is to help the water levels stay balanced so that if you put or take water into or out of the filter compartments, it will leak into the main compartment and vice versa.