So i picked up 3 lyretail anthias a few days ago and within one day one died. I researched and found that they should be in odd numbers. Is that true? should i get one or 3 more? i have a rsm250 (65 gal) mixed reef. i have 1 desjardini tang, 2 perc clowns, bicolor blenny, tiger goby and of coarse 2 lyrtail. thoughts?