steelayer;3040742; said:
Im just learning about this tank building stuff and was wondering Do you think the corners were the plywood meets and is skrewed together is strong enough? it seems like skrewing one pieace of plywood to the other wouldnt give you the streanght you need. Im probaly way off but wouldnt it make sense to put 1x1s in the corners and skrew both pieace of plywood to that also?
Search around on MFK here in the diy section. There have been many builds 200 gal to 800 gal that use this method. Usually they use 3/4" to true 1" plywood for these builds. Predrilled holes that innerlace at every corner top, bottom, and side. Most space the screws around 3" apart and use heavy duty 8-12 gauge screws. On top of that they glue the corners, fiberglass the inside, seal it with either epoxy or a gelcoating of some type or pond armor. All of these things add strength to the plywood. My tank that I'm building is not much taller than most of these builds but has a much more massive footprint. If braced properly I probably could get away with using some true 1" ply for my tank. Instead I decided it needed to withstand a direct nuclear blast!
So with everything that's done afterwards tanks made in this fashion are very strong. I'd definitely put a top and bottom railing of at least a 1x4 if it were me, but I tend to overdo it sometimes.