100 Gallon glass and hardwood tank

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Feeder Fish
MFK Member
Nov 11, 2011
138
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Florida
Greetings to all the Monster Keepers!

I have embarked on a quest to construct a 100 gallon community tank. I will be using an old desk as the base and stand and to hold the wet/dry and sump. I am repurposing a 30 gallon tanks glass for this project. The desk is 25 1/2 inches deep by 51 inches wide. I removed the stock legs, since I dont think they will hold up to 800 pounds and replaced them with 2 pieces of rough cut 2x4 red oak skids. I am calling this a hardwood tank, due to me not using plywood except as a shelf to hold the sump underneath. (I will post pics tonight).

I have 500 feet of 9inch wide Shadowlastic Window tape. Its 20 mil Polypropelene backed with Butyl Rubber. Both are fish safe, but since I have so much of this tape, can it be used to waterproof the tank. I will use primer and krylon fusion to line the grooves where the glass will be siliconed in ( i will be using all 4 pieces of glass for a window on each side) I know pictures say 1000 words, but will not have any until this evening.

Basically, I would line the desk top with three layers, overlapping the seams. I would then cut my window frames and line them with 2 layers making sure that the ends that would meet other wood would be taped as well, then before screwing them together, spread silicone as a gasket as well as siliconing the seams later. And them repeat the steps when adding the frames to the desk. I have reinforced the desk with treated 2x6 to be abvle to hold the weight.

Inside dimensions would be 48x23x23 lxwxh, the water would only be 18" due to the map turtles residing there.

Any suggestions?
 
Pics as promised.....
DSCN2187.JPGold re-purposed desk reinforced with PT 2x6's
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DSCN2191.JPGSeams of glass windows, taped and screwed together with silicone as gasket
DSCN2194.JPGsiliconed and screwed, after glass is in I will add one more layer of tape overlapping glass by 1/2 inch on all sides

suggestions?????

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Is this product intended to be submerged or just for weather proofing? I would not trust tape to hold water back for very long. Good luck with the experiment. I guess this is how new ideas are tested. I would fill the tank in a water safe area when its time. If there is any microscopic hole the water will find it.
 
I understand that this is just flashing tape meant to repel water not hold it, but with multiple layers with overlapping seams on the bottom(then covered in substrate to keep the seams compacted) I would think it would be like a 40mil liner. Also on the window frames, no actual seams would be in contact with water, them would be folded over and siliconed and screwed to the next piece....

Experiements are cool and fun, and with 4 kids, they love watching daddy 'create'.

I will keep an updated post as I go...

I build this in a weekend with tanks given to me and wood I found under the house...all my projects are used with recycled/repurposed materials since I am a construction foreman, I have unlimited supplies :)
 
Well, I finally got it put together. I ended up putting about 60 mil worth of tape with overlapping seams. Siliconed and screwed every 2" with a 2 1/2 in screws. I used neoprene spacers for the glass inserts with a butt load of silicone. If it leaks, thats where. Any questions or comments?

If it ends up being unsafe for fish, I will rebuild it with FRP and plywood instead of recycled wood.
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Definitely interested to see if this works. If it does hold water, this would be a great tank for a foam 3D background.
based on the amount of water I might suggest either a top cross member or a picture frame rim to help keep the tank from unneeded stress and bowing.
 
well its holding water, 20 gallons up to glass, going to reapply black silicone inside to cover wood and spacers. I also have a goldie and roseyred and a small filter, lets see if they survive the night
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We,,. the goldie and roseyred made it through the night. apparently non toxic short term. I have a small leak, so I will drain it, resilicone where needed, the cover all seams with another layer or two of tape, then test the windows, my RES i got last night is no getting along with my Map turtle so I need it to be up and going today
 
This is an awesome idea for a tank. My friend has been thinking about building his own 200 gallon tank, I'll have to show him how you did yours,
and...Where did you find that piece of driftwood? That is awesome!
 
A while back i had a friend that built a plywood tank and took it to Line-X (spray in truck bed liner) and had them shoot the whole inside of the tank to seal it. I thought it was a pretty cool idea. Line-X (at least what he used) is potable. To my knowledge it never leaked. I wish i knew what he spent to have it sprayed.
 
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