IME, if it is that big, eggs are already there. Is the frag a new addition? Take the rock out and when the zoos close, give them a good examination. The eggs will look like small white swirly strands. A FW
dip w/ lugols solution might be in order as well.
*180 gal Display, 100 gal basement sump, 33 gal refugium, 3x250 MH, 2x160 VHO actinics, zoos, some softies, LPS & lots of acros and other SPS.
*100 gal prop tank plumbed into main system w/ 2x96 PC lights and 1x150 MH,