Make a tunnel for your fish or other aquatic creatures to enjoy! Get a PVC pipe Y-connector at a hardware store. Paint hot glue or aquarium glue on the PVC pipe and press the pipe onto a pile of rocks, gravel or sand. Cover the inside and outside of the pipe to your fancy with rocks, driftwood, silk plants or ceramic figurines. Wash the aquarium tunnel before placing it in your fish tank.
Source: Rad Linc Crafts