dont u hate it when u spot somthing but b4 u get a good look its gone, i saw a few (no more then 3 or 4) specs on my purple tile today could be white spot, could be nothing. decided that... tommorow i will take this stuff i bought back to the LFS and swop it for somthing i used in the past. this will whipe out any worries of "reef safe" then delay my plans. keep monitoring and see what happens although iv noticed my regal tang and bi colour blenny scratchin a few times , no spots though......