PLEASE REMEMBER THAT SPONGES WERE ONCE LIVE.  THEY WILL NORMALLY HAVE A "FISHY" SMELL TO THEM FOR SEVERAL DAYS ONCE TAKEN FROM THE DELIVERY BOX. 

PLEASE ALLOW THEM TO "AIR OUT" IN A COOL PLACE. (NOT IN THE SUN).   THE SMELL TENDS TO LEAVE AFTER ABOUT A WEEK.  (REMOVE FROM BOX, AND PLACE IN A OPEN AREA).

YOU MAY ALSO SPRAY THEM WITH - Krylon^® Acrylic Crystal Clear.  THIS "SEALS" IN THE SMELL.