Repairing a265 gallon tank!

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MonsterFishRescue created the topic: Repairing a265 gallon tank!

Hi everyone! I got started on repairing this donated tank today... It's a 265 gallon tank that will eventually be connected to my 240 via a waterbridge made from 6" clear pvc... The tanks dimentions are 84"x30"x24" tall....
Ok, I’ve got an Update:

As some of you may know I’ve started threads about this repair on a bunch of forums across the net. I decided to do this for a couple of reasons. The first is to possibly give people another way to repair tanks, large or small. The second reason is to hopefully meet a few more people that live in the fish world! On a lot of sites I’m known as “monsterfishrescue” or “TheFishGuy”. My real world name is Jonathan… Nice to meet you!
I’ve decided to make updates on all the sites the same to save me some time typing this up over and over again… Lazy, I know… LOL
Ok, I’ll get to the point. We got rained out this afternoon so I decided to take some time with this tank. I’ll take you all through what I did this afternoon step by step. Hopefully that’ll be the easiest and most clear way to get an idea of what’s involved and what exactly I did!

Ok, here’s the Drylok for those of you that don’t know what it is or what it looks like. This is the water based version of the product, it’s a basement water sealer that so far has proved to work great for aquarium projects:
i47.photobucket.com/albums/f197/jstraz/265%20gallon/001-1.jpg

This is the Hardie Panel, This IS NOT hardie backer board for behind ceramic tile. This is another product made by James Hardie to be used as soffits on houses sided with Hardie plank siding. It’s 5/16” thick and it’s a 4’x8’ sheet. It is concrete board and can be special ordered at any lumber yard, Lowes or Home Depot for about $30 a sheet:
i47.photobucket.com/albums/f197/jstraz/265%20gallon/002-1.jpg

1.) The first thing I did was measure how big the panel had to be. I measured the tanks back wall and took off ¼” for breathing room. Since the Drylok lays on quite thick you’ll need some extra room.

2.) Next I cut the Hardie panel to 23 3/8” x 82 ¼”
i47.photobucket.com/albums/f197/jstraz/265%20gallon/003-1.jpg

3.) Then I tried to put it in the tank laying flat but it didn’t fit, glitch number one in todays project. We’ve got a saying at work that goes something like this. “There are no problems, just opportunities” So now I had the opportunity to break some glass! Ye ha!
i47.photobucket.com/albums/f197/jstraz/265%20gallon/004.jpg

4.) It seems as if the top braces were made from tempered glass, which explodes when you break it or try to cut it! LOL I also had to drill out the rivets that held the aluminum braces in and pry it off. No big deal really…
i47.photobucket.com/albums/f197/jstraz/265%20gallon/005.jpg
i47.photobucket.com/albums/f197/jstraz/265%20gallon/006.jpg

5.) It’s a perfect fit! (measure twice cut 16 times LOL)


But not without some damage. As I was standing the Hardie panel up inside the tank my knuckle rubbed on the back pane of glass on the tank. The tank won LOL
i47.photobucket.com/albums/f197/jstraz/265%20gallon/009.jpg

Nothing a little piece of cloth and some electrical tape can’t handle LOL
i47.photobucket.com/albums/f197/jstraz/265%20gallon/010.jpg

6.) With the piece cut and ready to go I was able to get the first coat of drylok on it. I painted about a 4” swath on the back side around the edges and two stripes somewhere in the middle. Now that I think about it I’ll probably paint the entire back with the next three coats to ensure that the silicone will stick to the back .
I finished this first coat at 2:11 pm eastern standard time so the next coat will go on at 6:00 this evening. Then a third coat at 10:00. And if I can drag myself out of bed tomorrow morning I’ll get the fourth coat on.
i47.photobucket.com/albums/f197/jstraz/265%20gallon/011.jpg
i47.photobucket.com/albums/f197/jstraz/265%20gallon/012.jpg



Since I’ll need the roller again in a couple hours I loaded the roller with drylok and rolled it into a plastic grocery bag to keep it from drying.


7.) With the first coat on and drying it gave me an opportunity to clean the tanks back pane of glass and clear the edges or excess silicone. I also removed a few of the other loose pieces of glass from the back so they wouldn’t become an issue later. I did end up using a couple of razor blades to clean the entire back of the tank. When it comes time a week from now the entire back will be cleaned with glass cleaner and acetone to make sure the silicone sticks!
i47.photobucket.com/albums/f197/jstraz/265%20gallon/015.jpg
i47.photobucket.com/albums/f197/jstraz/265%20gallon/016.jpg


Total time invested so far:

1.5 hours

Total money involved: $142.00

Tank: $0.00
Two tubes of silicone and one gallon of Drylok: $30.00
Hardie panel: $0.00
Three tubes of silicone already in stock $12.00
Water bridge (clear pvc and 90* fittings) $100

Questions or comments are always welcome!
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  • Verse34K
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Verse34K replied the topic: Re:Repairing a265 gallon tank!

very cool....
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  • MonsterFishRescue
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MonsterFishRescue replied the topic: Re:Repairing a265 gallon tank!

Ok, I’ve got an Update:

The piece of hardie panel went in well, it fit good! I’m feeling rather confident about this one 


After cleaning the glass with acetone (which I feel is key to a great seal) I cut a bunch of prop sticks to hold the hardie in place.





After that I siliconed the edges with a heavy bead and I also went over every crack in the glass. Beyond that I made circles out of the silicone to hold the hardie in place. Making circles is a trick I learned from mirror installers. It creates a vacuum and you actually hear the silicone “fart” as it’s pushed into place LOL



After the prop sticks were put in place pushing the hardie tight I ran a nice bead of silicone around the inside corners then smoothed it out with the back side of a spoon. That pushes any unwanted bubbles out of the silicone making for a tight seal.





Tomorrow when I get home from work I’ll have the task of moving the tank next to my driveway to fill it with some green nasty pool water to see if it holds. Others will say 24 hours isn’t enough…. I disagree  (plus I’m impatient LOL)

Wish me luck!

Here’s more pics!

i47.photobucket.com/albums/f197/jstraz/265%20gallon/006-1.jpg

i47.photobucket.com/albums/f197/jstraz/265%20gallon/008.jpg

i47.photobucket.com/albums/f197/jstraz/265%20gallon/009-1.jpg
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  • Necromancer4
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Necromancer4 replied the topic: Re:Repairing a265 gallon tank!

cant wait to see if it holds good luck

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MonsterFishRescue replied the topic: Re:Repairing a265 gallon tank!

Me too! so far so good :)
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MonsterFishRescue replied the topic: Re:Repairing a265 gallon tank!

The tank is almost full and no leaks.... well except for the bulkheads :?






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Necromancer4 replied the topic: Re:Repairing a265 gallon tank!

congrats on the repair. i hope to see pics when the tank is completed with the water bridge. i find the idea of connecting 2 tanks interesting.

Warning..I will offend you at some point!!!


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MonsterFishRescue replied the topic: Re:Repairing a265 gallon tank!

Thanks:) I think it'll be pretty cool too :)
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