I just set up a new ProStar 60 rimless tank. It's a cube. Currently there is only water, sand and live rock in it. I have the AI 16 HD light on an arm about 8" above the water. My current settings are UV-119%, Violet-116%, Royal-79%, Blue-80%, Green-4%, Deep Red-4%, and Cool White-19%. It makes annoying disco ball like light on the bottom of the aquarium. I'm wondering what adjustment I can make to get rid of this.