"Very Rough" sketch of my DIY Plywood 7x4x3

[Tstone]

Can I buy fiberglass cloth and just like "stick" it into the corners?

Also, got a quote for glass... Do you guys think it'd be worth the extra $250 to get starphire?

 

[nolapete]

Before you get started, I suggest you review a few builds by JohnG, VLDesign, and my own.

In particular, this one pretty much is by design what you want to accomplish.
http://www.monsterfishkeepers.com/f...2-1400-Gallon-Plywood-Stingray-Pond&p=5124093

While some might think the stacked 2x4 (2x6 in my case) is an expensive way to go, dimensional lumber is pretty cheap and a lot of structural integrity for the buck.

You can learn probably anything you want to know about fiberglass from JohnG. Max ACR available on Ebay is the product you want to use. It requires no final coat other than if you want to change the color.

JohnG's first
http://www.monsterfishkeepers.com/f...4202-10-x14-2500-Gallon-Plywood-Stingray-Pond

VLDesign's
http://www.monsterfishkeepers.com/f...ew-2600-gallon-plywood-tank-project&p=5127525

Mine
http://www.monsterfishkeepers.com/f...-Gallon-Plywood-Build-(3600-Take-2)&p=3504184