I have read this thread and understand the basic principles but how do u keep the 1.5 in plumbing from leaking at the connection sites?
if you are talking about the connections at the containers we use Amazing Goop glue, plumbers edition. walmart homedepot lowes etc
everything else is just standard pvc cement.
but what size system are you planning to build? in what shaped space? hard pvc may or may not be the best way for you to go.
what size plants?