Jessie

For those who are interested. Though experimentation, I have come up with this.

I wish I had a picture, but unfortunatly I don't have a camera.

By cutting 16 2x4x8's into 4' boards'
Drilling 3 1'8 inch holes in each board, 2 on one end and 1 on the other
Hammering them together with Rie Bar in a brick like pattern to form a box
Coating the inside with closed cell foam
Shaping a pond liner to the inside and drilling it to the top board

The result is a 300 gallon (roughly) that cost 180 dollars, and 2 days to make.
It's measurements are roughly 4ft square and 3 feet deep.

My Iredescents and other fish are now vastly enjoying there new found space and I am already making plans to make a bigger one. This one was more of a prototype.

Something I thought would be of interest to people looking for a cheaper way to house large fish and not having to worry about it popping.

sirdarksol

I've relocated this to the DIY board because it's an excellent idea that can be used for other fish. It's an idea that I might use at some point for my koi.

TSasaki

I'd be interested in seeing a picture or video of this. I love iridescent sharks, but sadly I had to give mine away.

Shaina

I'm trying to picture how the holes come into play and how this "bricklike pattern" work, and utterly failing :s

Sounds interesting though.