Alright here is the deal, I have read alot of threads and done alot of research on plywood tanks, and the one thing i have come up with is that there is so much uncertainty in whether products like pond armor and liquid rubber stand the test of time. So i have been trying to come up with a sure fire method (and it is total overkill but as long as It works).
This is going to be my winter project but im posting the thread now to give people time to pick it apart and offer there advice. The tank is going to be a built-in so there is also alot of other preperation to do outside of the tank itself, also i have yet to decide on how i want to filter it, but my first concern is getting the tank water tight.
I'm building a 8'x4'x4' 3/4 inch plywood box doubled up so 1 1/2 inch total , it will also be framed on the outside with 2x4 construction. The inside i'm going to seal with drylock to insure no moisture comes in contact with the wood. Next this will be lined with a 40 mil pond liner (havent decide if im going to use a adheisive to glue it down yet) . Then next i will be using 3/8 pvc sheets that are 8'x4' so that there will only be seems in the corners and at the joints at the bottom. I'm planning on solvet welding the pvc together to make another water tight barrier and then silcone them as well. I know that this is overkill, by using the pvc sheets i will have a surface to silcone my viewing window without having to figure out how to make it water tight with the pond liner.
I'm doing this a native tank (connecticut), so i will be stocking it with largemouth bass, smallmouth, bass bluegill, and whatever inhabits my native waters, but i want this tank to be around for many years so i'm taking every precaution on making sure it is successful.
This is going to be my winter project but im posting the thread now to give people time to pick it apart and offer there advice. The tank is going to be a built-in so there is also alot of other preperation to do outside of the tank itself, also i have yet to decide on how i want to filter it, but my first concern is getting the tank water tight.
I'm building a 8'x4'x4' 3/4 inch plywood box doubled up so 1 1/2 inch total , it will also be framed on the outside with 2x4 construction. The inside i'm going to seal with drylock to insure no moisture comes in contact with the wood. Next this will be lined with a 40 mil pond liner (havent decide if im going to use a adheisive to glue it down yet) . Then next i will be using 3/8 pvc sheets that are 8'x4' so that there will only be seems in the corners and at the joints at the bottom. I'm planning on solvet welding the pvc together to make another water tight barrier and then silcone them as well. I know that this is overkill, by using the pvc sheets i will have a surface to silcone my viewing window without having to figure out how to make it water tight with the pond liner.
I'm doing this a native tank (connecticut), so i will be stocking it with largemouth bass, smallmouth, bass bluegill, and whatever inhabits my native waters, but i want this tank to be around for many years so i'm taking every precaution on making sure it is successful.
