There are a few ways to reattach pool tiles. One way is to use an adhesive like epoxy or silicone. Another way is to use tile glue, and a third way is to use roofing cement. If you're using an adhesive, be sure to follow the manufacturer's instructions for application. If you're using tile glue or roofing cement, spread a layer of glue or cement on the back of the tile and then press it firmly against the surface of the pool. Hold it in place for several seconds until the glue or cement sets.

There are a few ways to reattach pool tiles. One is to use an adhesive such as epoxy, which can be purchased at most hardware stores. Another option is to use tile adhesive, which can also be found at your local hardware store. Finally, you could also use silicone caulk, which can be bought at most home improvement stores. Whichever adhesive you choose, make sure that it is specifically designed for swimming pools - otherwise it might not adhere properly and your tiles could eventually fall off again. If using epoxy or tile adhesive, follow the instructions on the packaging carefully in order to get the best results.