Stand or not for huge plywood tank

[SeabeeShrek]

I got all of the interior plywood installed. Currently applying Bondo into all of the visible seams and around the side window frame.
Later I am going to tackle the front window frame. The first two pieces of plywood in front will be 82” x 48” with an opening 70” x 40”. The third piece will be 73” x 46” to allow for 1” of silicone around the edges. I’m going to put a few blocks under the glass to maintain the spacing.

 

[SeabeeShrek]

The upper joists will have 2x4 cross bracing before covering with 3/4” plywood.

 

[SeabeeShrek]

Here’s the front window AKA table top.
It’s 72x44 , 3/4 inch thick .

 

[SeabeeShrek]

Starting on the front window frame. I needed a break from the Bondo work, about 3/4 done with that.
This is the first ply, I have two more to do. The third will be 2 1/2” narrower to accommodate for the edge of glass and the outer silicone.

 

[SeabeeShrek]

I figure that I’m about a week away from fiberglassing the tank.

 

[jstevenz]

Looks great. Love the consistency, cant wait to see the finished product

 

[SeabeeShrek]

3 layers of 3/4” plywood added. All the seams are filled with Bondo and the fiberglass is ordered. I’m using chop strand for the seams and 24 oz woven cloth for the floor and walls. Haven’t decided yet on the color….black or a light grey. The epoxy will either covered by Semco or Herco, rubberized membrane. If it adheres to the epoxy, otherwise no epoxy and straight membrane. Making a small plywood box to test it out before making a huge mistake.

 

[SeabeeShrek]

I meant liquid rubber, not Herco( not recommended for wood).

 

[Twoo2266]

I’m currently designing a plywood tank roughly around 1900 gallons. I like the idea of no stand, but then I have to build an area for my filtration. I’m interested in your input here. The area it’s going in has cathedral ceilings , so height isn’t the issue. It’s just the extra weight is a concern. Also being in SWFL, it’s on a concrete slap with 24” tiles.
The pics show the direction that I’m going, except that the window will be 72 x 44 3/4”
If I keep on the floor it’ll be 4x4 base with 2x6 framing.

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It’ll be insane.

 

[SeabeeShrek]

It’ll be insane.

Yeah, it takes up the entire dining room