i say it would be good i have a 6 bulb fixture over my 125 keeping sps no problem, the only thing i would change bulb combination, i use 4 blue plus 1 coral plus and a purple plus
A 6 x 54 watt T5 HO fixture would work. I would also change out the lamps. I like ATI Blue plus and ATI Aquablue specials though. I'm not a fan of the pink look. It's personal preference really, just make sure you pick quality lamps like ATI or Giesemann.