HELP. I have a Nudibranch infestation in my bio cube so severe that I have taken the tank apart, re dipped the corals, dipped and scrubbed the rocks and have everything sitting in a small quarantine tank overnight. What do I do with the sand in the infected tank? Nudibranch are in the back chambers of the bio cube. I am scrapping them down as much as I can. I don’t know if the eggs will be in the sand. Can I just vacuum the top of the sand, or flush it out with new water or do I have to throw out the sand and start new?