plywood tank?

[jaggy]

hi guys in the new year i want to build a ply wood tank , fiberglass line it ,
i live in uk nd have a 6x2x2 tank at present , but i feel it is very limiting depth wize and due to where it is kept to awkward to reach left hand 2 feet of tank , , so i want to build a 4x4x2 , ie 4 foot long 4 foot deep , and 2 foot from front to back ,
will this be possible with a ply tank? also what thickness of glass or acyrilic should i use? some folks hear recon for 4 feet depth i will need 25mm glass or acrylic , is there any chance 20 mm will do if glass is toughened , or would acrylic be the better option all round? i will post pics of the project as i get going , any advice on how think fiberglass should be etc for this tank greatly appreciated!

[jaggy]

here are a fewq pics of my present stock in my 6x2x2


http://i64.photobucket.com/albums/h177/marcann/043.jpg

http://i64.photobucket.com/albums/h177/marcann/041.jpg

http://i64.photobucket.com/albums/h177/marcann/Picture057.jpg

http://i64.photobucket.com/albums/h177/marcann/Picture058.jpg

[CyclistMT]

Nice animals you've got there jaggy!

Here's a link to my plywood thread that contains links to other larger plywood tanks that may help you out with construction techniques.

150g Plywood and Glass Aquarium (http://www.reefcentral.com/forums/showthread.php?s=&threadid=970006)

As for the 4' tall glass panel, I'm not sure what to think there. You might be able to get away with 20 mm toughened but but there will be a lot of pressure on a tank that tall. Here's a link to an article that contains some engineering formulas that might help you decide what's best.

The Nature of Glass (http://www.fnzas.org.nz/articles/technical/nature_of_glass/)

Good luck!

[jaggy]

cheers!