I have an extra AI Prime HD sitting around and my sump’s refugium chamber is empty. I figured why not try growing some chaeto. I already have a tennis ball size of chaeto from another tank. I took the chaeto and used fishing line to attach it to an extra piece of rock. Now to figure out the spectrum setting on the Prime. I know Kessil’s refugium light is supposed to be more pinkish/purple. Has anyone else used a Prime HD as a refugium light? If so, can you please share your spectrum settings. Any other suggestions are welcomed.