from my own experience with zeovit so far, I would suggest the same. only now are 80% of my corals starting to show colouration (the other 20% i expect are just brown acro's) only at the tips to start but colour is slowly down to the base - definate signs finally! i dont put this purely down to zeovit though, i think the new lights (or more specifically lights much closer to the waters surface) has made a huge improvement (cheers for the tip pies ). i still havent add the 4 x T5's to my tank yet but when i do i would expect to see faster colouration still.