Need help!!! I purchased a Tunze 6100 along with the single controller and the photocell. I have a 120 Reef tank (Oceanic - 48" wide x 24" deep - the height is 30" I think). Anyhow, I place the pump on the center/top of one of the sides moving the water to the opposite side. How much power should I have the controller set to? The first pulse is about 75% and the second pulse is set at 30%. Should I set the first pulse at 100%? Not sure which is the best way, as I don't want to stress the fish and coral. Thanks!