4300 Gallon Plywood Build (3600+ Take 2)

Unconfirmed research suggests that working on monster tanks may boost the immune system and shorten the duration of the common cold. :thm:
 
Best of luck with this endeavor!
 
I just came across this post a few days ago.

Good luck. I can't wait to see the final results.

You should really be careful around the window. I'm guessing this is where your previous leaks was coming from (even though you tried to check that).
 
Here's 3 of the 4 stages of putting the back frame together.

1) The 2x6s were attached with 3" and 2.5" deck screws. We had to rip the top board to make it provide the correct gap above the window. Other than that the cuts were just for length.

2) Window taped with painter's tape to keep the Rubber Coat and Dow 795 off of the window. I like the wide tape as it gives a better margin for error.

3) Six tubes of Dow 795 were used to fill the gap between the 2x6 and the window. The 2x6s were flush mounted against the plywood sheathing and overlapped the rubber gasket providing compression on it.

012.JPG 019.JPG 018.JPG 006.JPG 004sm.jpg 009.JPG 016.JPG 017.JPG 015.JPG 005sm.jpg
 
awesome;) looking great!:)
 
Finished the first coat of Permadri Rubber Coat on the frame after taping up newspaper to cover the window. The Rubber Coat has kept very well being stored inside. After over a year of sitting close up the water separated from the other materials, but went back together rather easily with some stirring. I'd suggest having a drill powered paddle stirrer available for this task though. Two more coats then a week to cure then filling time.
 
AquariaCentral.com