None of my tangs (Naso, Blue hippo, yellow) will touch chaeto. I have had no success with clips either, they are scared of the clip and waving nori. They all LOVE Spirulina flakes. I also feed enriched frozen brine with spirulina. I have had these tangs for about a year with good growth and color. I have always felt lateral line disease in tangs is related to poor nutrition and these guys are fat, happy, growing, in full color and no signs of lateral line disease. Also, I put caulerpa prolifera from the fuge in the tank about once a month when decreasing the macro there and they eat that.