T5 bulbs should be changed at least once a year, preferably every 8-10 months IMO. How far away from the lights are your rockwork? do you have detectable phosphates, nitrates? Did it bleach before or after you moved it? Some times anemones will bleach if not acclimated to strong lights properly, or from prolonged stress and not enough light. With 4 bulbs over a 75 it should be fine if its a bubble tip, but if its low stacked rocks, it may not be enough.
I thaw out food with tank water, and would recommend rinsing it again with tank water so you don't add all that nutrient soup into the tank. Any meaty food is fine, but make sure it's hasn't gone bad (thawed and refrozen in shipping sometimes), best to go with fresh seafood from the grocers, chop it up and lay it thin in a ziplock bag, then freeze it.
Make sure you feed it small meals, that way it gets a chance to digest it before it starts to go bad in its gut. Like if your nem is 3-5 inches across open, maybe a pea sized portion at a time.
I've soaked food in selcon for all my critters, and I've heard that helps nems too. I've also heard from someone that soaking the food in a live algae product that contains zooxanthellea (the symbiotic algae for corals and nems) will speed up the recovery, but I'm not sure if nems can take in the algae that way if it has to come from the parent.
