Plywood tank design development

  • Theaggressiveoscar
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Theaggressiveoscar created the topic: Plywood tank design development

As some of you may know my 300 gallon tank broke about 4 months ago, I was determined to build a plywood tank but I was too busy with work and school that I dind't have the chance to even begin. But now the time has come :)

I've been doing my homework regarding the tank and now have a clear picture of what to do, here's what I've come up with:

(used SketchUp instead of AUTOCAD because accuracy isn't that critical right now, I'm just trying to get a picture of how it would look like and how it would all come together)









The tank itself would be made out of 3/4" plywood within a frame made out of 2x4s to increase strength and prevent the plywood from bowing. The glass is 3/4" (wich is the back panel from my broken 300g tank because it is still intact even after the tank collapsed) the glass measures 96 1/8" X 30"

I will use pond armor epoxy in order to make the tank waterproof, I'm thinking about using pond armor because in its cured form it will create a strong bond with the silicone that I will use to put the glass in place. and it is also readily available at home improvement stores like home depot and lowes, and comes in a wide range of colors.

The plywood tank itself (held within the 2x4s frame) will measure 100" Long X 40" Deep X 35" Tall, which comes out to having a capacity of almost 600 gallons!! :laugh: My dream tank!

The filtration will consist of 2 400 gallon rated wet dry filters (wich will conveniently fit underneath the tank :silly: ) along with a fluval fx5.

There is one issue though!!!!! Since this tank will be over 96" long I can no longer use standard sized plywood that comes in 4'X8' sheets for the front of the tank where the glass will be placed. :unsure:
I was thinking about using 10'long 2x4s, cutting them to size, and screwing them together really good into the tank. But I am not sure if that will be strong enough. Any ideas?
I could always get an oversized piece of plywood from a company that sells lumber but it will cost much more and in my opinion not worth the extra 4 inches.

This was of great help: www.jonolavsakvarium.com/eng_diy/2200litre/2200litres.html


So, there you have it. I am looking for advice on how to improve this build, I have never tackled such a project before so I need to be extra careful before hand so I don't end up with a complete disaster.
Any helpful advice is greatly appretiated :)

Also..Props to JasonR for his awesome 300g build! very inspiring :woohoo:
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  • RoxyTheDog
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RoxyTheDog replied the topic: Plywood tank design development

Wow that's going to be amazing!

Can't help with any of the tech details though, you'll have to wait for the plywood masters of OFL :laugh:

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  • kjkramer
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kjkramer replied the topic: Plywood tank design development

Jason will be an incredible asset on this build since he just completed his. I am sure what went well and what he would do different are very fresh in his mind. I just hope he shares on this public thread instead of private so we can all learn ;)
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RoxyTheDog replied the topic: Plywood tank design development

And Jnet, if she comes back to visit us!

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  • Theaggressiveoscar
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Theaggressiveoscar replied the topic: Plywood tank design development

I just want someone to review the plans before I actually start it, Don't want to make a critical mistake.

I just hope someone can give me some feedback soon :unsure:
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kjkramer replied the topic: Plywood tank design development

Did you look at Jason's 300 plywood build thread?
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  • JasonR
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JasonR replied the topic: Plywood tank design development

The design looks great man! You can definately use stacked 2x4's for the window frame, people do it all the time and it will be plenty strong. Looks like every thing else structurally will be pleny strong as well. Make sure to use higher quality plywood, glue every thing together and be patient cuz it'll be a long build!Lol
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Theaggressiveoscar replied the topic: Plywood tank design development

Awesome! The project will begin this week then.

I'll start off by building the window and installing the glass so I can then make everything fit around it.

What do you think I should use to glue everything prior to screwing? Liquid nails or just good ol' wood glue?

I'm hoping this project won't take that long. Hopefully a month or so, but we'll see :)
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JasonR replied the topic: Plywood tank design development

TBH i would not install the glass until the tank is built and sealed. I can forsee a number of problems/inconviences doing it this way. I used elmers wood glue max. Very strong and waterproof
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Theaggressiveoscar replied the topic: Plywood tank design development

Understood! Thanks! :)
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