Go Back   Aquarium Advice - Aquarium Forum Community > General Aquarium Forums > DIY Projects
Click Here to Login

Join Aquarium Advice Today
Reply
 
Thread Tools Search this Thread Display Modes
Please support our sponsors and let them know you heard about them on AquariumAdvice.com
 
Old 11-01-2014, 02:46 PM   #1
Aquarium Advice Newbie
 
Join Date: Nov 2014
Posts: 6
300 Gal beauty cracked bottom. Any hope to repair?

Bought this 300 gallon wrap-aroound beauty for a lot--a lot for me. Shippers cracked the bottom. Like an idiot, I did not insure during shipping. Leaks at bottom. If I fix the links, does anyone know if it might shatter over time?



The bottom is made of three pieces of 1/2 inch glass. The middle piece has two banana shaped cracks running about 14 inches to the back of the tank. The tank has a wooden apron running around it and is itself sitting on 1/2 solid teak based. In other words, if you lift the tank off the stand, it has 1/2 inch of solid wood base attached all around the bottom. So the tank sits on the 1/2 inch solid wood and the 1/2 inch solid wood sits on the base. I have attached a picture of the tank bottom. You can see a couple of extra pieces of glass have been siliconed over the crack that runs from the center to the upper right of the picture.



I'm about to try to cover the bottom where the cracks are entirely with GE Type 1 silicon. And if that doesn't work I may get an above ground swimming pool liner and find an adhesive to adhere it to the entire bottom of the tank, basically to create a lining for this compromised tank.

So my question is, if I manage to stop the leak, and it holds without shattering catastrophically for, for example three days, then will it hold over time? My hope is that if it holds for a few days, then it will probably hold for 30 years. I can't see the bottom of the glass cracking any more because the weight of the water is supported by the wood underneath the glass, not the glass itself.

Does anyone know if a cracked glass bottom that has been made waterproof is at risk of just breaking out the wood underneath and shattering catastrophically?
Attached Thumbnails
Click image for larger version

Name:	WP_20140914_003.jpg
Views:	1557
Size:	165.3 KB
ID:	254463   Click image for larger version

Name:	WP_20141101_001.jpg
Views:	1874
Size:	153.9 KB
ID:	254465  

__________________

__________________
myDorazio is offline   Reply With Quote
Old 11-03-2014, 10:13 AM   #2
Aquarium Advice Regular
 
Join Date: Aug 2014
Posts: 57
I would do the liner idea. Check with a local roofing contractor and see if you can get a piece of rubber roof. Seal the entire bottom with the GE then put the rubber on it. Just like adding another layer of film to a piece of safety glass.
__________________

__________________
PA Pat is offline   Reply With Quote
Old 11-05-2014, 12:46 PM   #3
Aquarium Advice Freak
 
AdamsAquarium's Avatar
 
Join Date: Aug 2014
Location: San Diego, CA
Posts: 273
I would do it. I have a 240 gal tank that also got a crack in its side and it will cost more money to replace the glass than it will to buy a new tank. In automobile terms, it is totalled. You don't want to risk filling up the tank with anything but solid pieces of glass, if you do this tarp idea and try to silicone the glass, it will burst because that will be a weak spot.

However, the ONLY thing I can think of, is if your crack is small enough, you could cut out the crack in a circle and use a bulkhead fitting to fill it and have that run to your sump.

But otherwise, your tank is compromised and 300 gallons breaking through the glass not only will hurt you severely if you are near by, but will also ruin your house

Sent from my SM-N900V using Aquarium Advice mobile app
__________________
AdamsAquarium is offline   Reply With Quote
Old 11-05-2014, 06:29 PM   #4
Aquarium Advice Addict
 
Join Date: Aug 2013
Location: Mississauga, Ontario, Canada
Posts: 2,270
Too true. In smaller tanks I have repaired bottom cracks that extended from side to side, by applying a large piece of glass that was several inches wide to cover the entire crack, situating the crack down the middle as much as possible.

I carefully smeared a thickish layer of silicone over the new glass, using a paint stirring stick to level the layer as much as I could. Placed it on the crack, which was supported underneath with wood, and gently pressed and slightly twisted the new glass piece down, much as you do when applying ceramic tile. I allowed the silicone to squeeze out all around, then smoothed the silicone over all the glass edges so that there would be no chance of either myself at some later date, or a fish, coming in contact with a sharp glass edge. This is on the inside, not the outside. I also put a bead of silicone over the crack on the outside and mushed it a bit flat, so it covered the crack well.

Because I feared the silicone sandwich would be a bit starved for air, I let it cure for a week before using it. So far, so good. Same basic idea has worked on side cracks too, in small tanks. Less than ten gallons. Since your tank has the support underneath, you might, possibly, get away with this kind of repair. I'd use half inch glass to make the repair with and let it cure for a couple of weeks. Edit.. just a piece of half inch glass is not cheap.. it gets very costly once you're past quarter inch thickness. And I'd want some kind of restraint around the circumference of the tank, at the bottom, a sort of giant band clamp or hose clamp, though how you'd get one that size I can't imagine. It might not look that great to have such a clamp, but would help fight sideways pressure. You don't just get pressure going downward, you also get pressure outward against the side glass. If you could find such a thing, might help.. this is just me thinking out of the box a bit, I'm not at all sure it could work.

And the risk is SO high. ONE gallon of water weighs a bit more than 8 pounds. 100 gallons is over 800 pounds, so your tank, full, would be in the neighbourhood of 2500 pounds of water, plus any rocks or gravel. It's an enormous amount of pressure that would be pretty catastrophic if it failed.

If you thought you wanted to try a fix, I'd want to move the tank to someplace else to do it. A storage locker maybe, or a garage. Somewhere so the water had a safe place to escape, maybe run down the driveway to a culvert or something of that sort. I'd make sure there was nothing that might be damaged by flying glass anywhere in the vicinity of the tank when it was test filled too.

I'd fill it with a hose from a good distance away, very, very slowly. If it held up for a few weeks, possibly, it might be ok. But stress over time might one day still result in a major disaster. But then you'd also lose all the fish, etc, as well.

It is truly a shame you didn't think to insure it, but how much will it cost you if it fails inside the house ? 2500 pounds of fishy water, the livestock, plants & rocks & gravel will all be exploding all over the place. Possibly flying glass shards could go in all directions too, maybe take out a window or a person ?

I really do feel your pain and I'd want to try and fix it too. But I fear the risks outweigh your chances of success.

Though I suspect it would cost as much as or even more than a new tank, I suppose you could try to have an acrylic liner made to fit inside it. You'd lose a bit of volume, but the overall appearance would be pretty much the same. Have to seal it somehow at the top so nothing could fall or work its way into the space between the glass and acrylic, cause you'd never be able to get it out.
__________________
Fishfur is offline   Reply With Quote
Old 11-07-2014, 12:47 PM   #5
Aquarium Advice Addict
 
evil Nick's Avatar
 
Join Date: Oct 2014
Location: CT
Posts: 1,094
Fixing something like glass to me is risky when weight is on it. You may think you have the entire crack covered but a hairline may exist past the patch area. Then when the weight of water and decor is added the glass on the bottom will stretch/stress at the crack extending it. Unless you are actually patching the ENTIRE bottom I wouldnt risk it.

I would personally go after the shippers. Did you inspect it on delivery, if you saw the crack I would have turned it away and made them pay for the repairs. Even a small claims would be better.

If you really want to repair it though I would either get a piece of glass or aquarium acrylic cut to the EXACT shape of the bottom (thats tough). then I would not even silicone the crack and just lay the new sheet over the old one and seal the edges. As another poster said you will STILL need a support under the tank because if that old glass is NOT sitting flush on something and raised off the base of whatever its on even an inch it will still eventually give. You could try as he said and use wood. Cut the wood to the EXACT shape of the glass and place it UNDER the thank to keep the glass from stressing.

I would take his advice as well and test this AWAY from your indoors. If its warm where you are leave the tank outside a few weeks filled and see if it holds up before committing to your indoors.
__________________
evil Nick is offline   Reply With Quote
Old 11-07-2014, 12:59 PM   #6
Aquarium Advice Addict

POTM Champion
 
Join Date: Apr 2014
Location: Southern Cali
Posts: 1,734
you say there is wooden base attached all the way around, is the entire bottom of the tank covered with the glass in direct contact with the wood or is it a frame around the bottom with gap between the actual glass plate and the stand/base?

If it is the first and the ENTIRE bottom plate is in contact with the base then you may be able to make it work. That way the wooden base is actually supporting the weight of the tank contents and not the glass plate itself.

If it is a frame and there is a gap under the plate, as in conventional "off the shelf" glass aquariums, the chance of a failure is much greater.

Personally I would only ever go acrylic on a tank that size with that many seams.
__________________
PB_Smith is offline   Reply With Quote
Old 11-07-2014, 01:12 PM   #7
Aquarium Advice Addict
 
evil Nick's Avatar
 
Join Date: Oct 2014
Location: CT
Posts: 1,094
Quote:
Originally Posted by PB_Smith View Post
you say there is wooden base attached all the way around, is the entire bottom of the tank covered with the glass in direct contact with the wood or is it a frame around the bottom with gap between the actual glass plate and the stand/base?

If it is the first and the ENTIRE bottom plate is in contact with the base then you may be able to make it work. That way the wooden base is actually supporting the weight of the tank contents and not the glass plate itself.

If it is a frame and there is a gap under the plate, as in conventional "off the shelf" glass aquariums, the chance of a failure is much greater.

Personally I would only ever go acrylic on a tank that size with that many seams.
exactly even a 1/8" gap is too much stress on glass for anything you need to have the cracked sheet sandwiched TIGHT
__________________
evil Nick is offline   Reply With Quote
Old 11-07-2014, 02:51 PM   #8
Aquarium Advice Addict
 
Join Date: Aug 2013
Location: Mississauga, Ontario, Canada
Posts: 2,270
The point about going after the shippers is a good one. Even though you did not insure it, they had an obligation to deliver the goods in usable condition. If you were unable to observe the crack due to the packing materials, I'd certainly contact the shippers and ask to submit a claim. If they refuse, take them to small claims court. It may be cheaper for them in the long run to satisfy your claim than to go to court. Court means a lot of time, possibly a lawyer and the risk they'll lose and have to pay anyway, though collecting a small claim can sometimes be a lot harder than winning a case.
You might get a lawyer to write the company demanding they make good on the damage if they refuse a claim as well.
Don't wait if you want to try this, there are often time limits imposed by law.
__________________
Fishfur is offline   Reply With Quote
Old 11-07-2014, 02:59 PM   #9
Aquarium Advice Addict

POTM Champion
 
Join Date: Apr 2014
Location: Southern Cali
Posts: 1,734
Sadly, if he didn't examine the cargo upon delivery and verify with the delivery person, it amounts to his word against theirs.
That is now greatly compounded by the fact that the tank has since delivery been filled and emptied of water and altered. Who's to say it didn't crack when first filled?
(not saying the OP is lying, just playing defense lawyer for the truck driver..LOL)
No shipping company would honor a claim without prior insurance under those circumstances.

Maybe try the seller of the tank?
Surely they have some type of warranty.
Delete this thread and start a new one about how it arrived perfect and then cracked when it got halfway full.
__________________
PB_Smith is offline   Reply With Quote
Old 11-07-2014, 04:15 PM   #10
Macro Addict
Community Moderator
 
54seaweed's Avatar



POTM Champion
Tank of the Month Award
 
Join Date: Apr 2012
Location: Colorado
Posts: 7,541
weather you had bought ins or not the shipper is liable just a fyi
it wouldn't be for full value but a pro rated value maybe get $100.or so when its all said and done
each item shipped is covered under the shippers ins up to a certain amount the ins you didn't purchase would have covered the rest
__________________

__________________
Save
54seaweed is offline   Reply With Quote
Reply

Tags
air, bottom, crack, pair, repair

Please support our sponsors and let them know you heard about them on AquariumAdvice.com

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
DIY Tank Repair? (broken bottom glass) ItchyF1ng3rs DIY Projects 56 08-20-2013 09:02 AM
Cracked glass repair??? DrRockzo DIY Projects 2 02-11-2012 08:19 AM
Bottom of 180 gal cracked... biguebs DIY Projects 39 06-20-2011 02:12 PM
cracked frame repair clancy888 DIY Projects 1 07-13-2010 01:10 AM







» Photo Contest Winners








Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -4. The time now is 10:53 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.