I would dip, if it's a pest with a specific diet you will kill the adults and then re dip. I used bayer advanced as I was getting into sps, I brought in a cheapie frag and when I dipped it appeared to have red bugs :-/ luckily I only had two other sps at that point, evey 5th day they all took a dip, I did that for a month. After the second dip I didn't see anything suspicious