electric130
Active member
i have mine pointing slightly down from parallel to the ground. if the holes are parallel to the ground and right at the surface, they will have a tendency to pull in air bubbles from the surface. but i didn't want it pointing down too much since i have a couple frogspawns right at the top of the tank. if you're doing sps up there, the would love the current. so the angle just really depends on the animals you have and their placement.