It's typical for an anemone to look ok when 1st transferred to our tanks, then go downhill from there in short order (esp. in a new tank...) I'll bet that anemone was bleached, not doing well to begin with (& probably the reason it was dyed); it was added to a month old system not mature enough for anemones; then blasted with halide lighting right away w/ no acclimation. Most likely a combination of all 3...
Water parameters in new tanks fluctuate alot while the system is building it's bioload, & aren't stable or mature enough to support an anemone. There's reasoning behind why it's recommended to NOT add an anemone to a tank under 6 mos old...:reading: