Tank and corals look awesome! You've got to love halides. I'm building a T5/LED fixture at the moment, but I'm probably going to miss my halides. :lmao: I'm not sure if anyone has mentioned it, but if your Phoenix's are too white, then your ballast may drive the Radiums, so that they're too white as well. The two bulbs are not the same, but they behave similarly. If on electronic ballasts, they're more blue. If on M80 ballasts, they're more white. Either way, you can't go wrong with a Radium (I'd personally say the same thing for a Phoenix). But, if you're looking for more blue already (without supplemental lighting), you may want to consider running bluer bulbs in some of the sockets. XM 20k's are not amazing for PAR, but they're pretty blue. You could try a mix.