I've got an existing pond sitting in my front yard and it's time to enlarge it. The liner is a pvc liner that came in 1 of those pond kits from Wal-Mart. At the end of the summer last year I bought another one of those kits on sale with the thinking I could combine the 2 liners to make a larger pond. Now it's getting time to do this and I've got one major question....what type of bonding agent do I use? I had a friend tell me to use pvc glue, but I'm not sure how much I trust that answer, so I figured I'd try asking here. I tried searching the forum here and didn't find a decent answer or perhaps just overlooked it, so any help is greatly appreciated.