It will problably attatch in 3 or 4 days but I would leave it on for a week. You will see in a few days that the stalks will be sticking out through the netting. When it comes time to remove the netting, just lightly massgae the Xenia with your finger tips and they will shrivel up, thus allowing you to remove the netting. Then just place the Xenia wherever you want. When you do remove the netting, try not to take the Xenia out of the water, this way it wont get as stressed out. And dont be alarmed if you smell a strong odor while doing so. that is normal for Xenia.