I have a Reefer 250 with a G6 XR30 Blue. I am adding a Aquatic Life Dx18 dimmable 4 bulb 36 inch that will be controlled by my apex. I have never used a T5 fixture before and was reading up and leaning towards Blue actinic and a blue plus? But I also see people use a purple. The tank is 100% SPS. Any advice would be helpful. Thanks!