so i went to the fish store to buy some live rock. 1 piece had a white tube sticking out of it. the lady took it out of thetank i said to fill it with waterright away and she didnt she put a wet papertowel in the bad. soi get home and put it in the tank right away. and i wake up today and where the white tube was it has like cotton growth around it and the tube is slanted. what could that be? most likely a sponge that she killed? but the cotton is my issue help is appreciated. the lady was an idiot i can tell or racist. she also bagged up my damsels together. 2 domino and 1 yellow tail which the dominos chewed up.