Well two or three feet deep is a big difference

At 2' I doubt SPS will flourish toward the bottom, but the softies and LPS might do OK. But it depands on the ballast/bulb combo. At three feet deep, you might not be able to keep much toward the bottom depending on the bulb/ballast combo.
I'm guessing these are the coralife clip ons, but I can't be certain.
Also keeping SPS, Softies and LPS may not work. SPS requires a lot different parameters than some sofies and vice versa. You will need to really do your homework when putting a mixed reef together like that... Not everything goes well with everything else
