Ok. Thanks for the response. I only had one SPS in my old tank. It was a Nanocube with the lower led light. It didn't make it very long. Maybe the light just wasn't powerful enough, maybe because it was only the white light only I think it was 14000k. I grew a ton of LPS though. This is my first "real tank". I'm really liking the t5 hybrid though. I figure if I can get by with primes I can get an Apex too which would be awesome.That would be way more than enough for a 3 ft tank of LPS and would grow SPS up top in some hight par areas as well. You are correct that some phosphate and some nitrate are good for SPS.....and especially for LPS.