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How to repair the bottom of a fish tank? Answered

My 15 gallon tank (24 inches long and 12 inches wide) has a cracked bottom. Does anyone have a fix it idea?

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Yonatan24
Yonatan24

11 months ago

How big is the crack? You can get a glass pane, usually 12x10" from a printer/scanne, and just glue it on the crack, maybe.

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Yonatan24
Yonatan24

11 months ago

Can you buy new glass and glue it onto the the previous one, without even removing the old one? Seems like the best idea, to avoid thousands in possible damage.

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Zmin
Zmin

11 months ago

I've got a method of breaking an aquarium that wasn't in the video. I was given a brand new 55 gal with a cracked bottom. A guy got it back in the Fall and brought it home and left it out under his carport over night. Then he left for work the next morning. His wife decided to do him a favor by "cleaning" the aquarium using hot water poured right in the middle of the cold tank. It cracked long ways from one end to the other. His wife thought since it wasn't an actual hole that she could hide the crack under some sand and he'd never know it was there. When he came home his wife had already gotten the tank into the house and put the sand in the bottom for him. How nice! He set up his new tank and started filling it with water. It didn't take long for him to figure out something was wrong. He got so upset that he just wanted it out of his sight. It was a literal bad break for him but lucky for me.
Kodinox


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Downunder35m
Downunder35m

11 months ago

I had the same pleasure a few years ago when the retard setting it up dropped a rock :(
Was about to call it quits and relace the entire bottom but it was all in aluminium corner frames for extra stability.
Next to impossible to just get the bottom out without fully rebuilding the entire tank.
So I went to our local glass specialists and ask for a suitable replacement and a way to fix it without taking the tank apart.

Mind you: I had a clean and non leaking crack!
The advise that I got worked until I replaced the tank with a bigger one a few years later.
I could not add a pane from the top as a whole due to the vertical glass elements holding the cover.
And I was told internal patchwork is neither a good idea, nor a lasting one.
The guys did some fancy calculations based on my tank size and cuta piece to be glued under the tanks bottom.
Was a perfect cut with less than 1.5mm to spare between the aluminium strips :)
The most expensive part however was the required glue.
Normal silicone appearently does not work well here as it leaves and uneven layer no matter how good you try and it forms a skin too quickly for this type of job.
So I was a given a tube of honey like silicone that required applying and activator on the glass surface (after cleaning of course).
Can't remember the amount I was told to use for the size but :
I made three even dots on the new pane with even spacing on the center line.
Then the tank was carefully lowered onto it while making sure the pane lines up properly.
Took about 10 minutes for this silicone mix to spread out but it filled the entire pane.
The excess was wiped off while it was coming out of the gap, then I let it rest over night.

From what I remember the trick makes sure that the new pane will hold all the weight and makes sure nothing can "ben" in the crack, while the original and cracked pane just acts as a seal for the walls.

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Orngrimm
Orngrimm

11 months ago

Please more information...
Material of the bottom?
Cracked like a visible but non-leaking crack or a crack with seeping water or apart and rushing water?
Can the fish tank be emptied for repairs or does it need to be a "wet repair"?

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Jack A Lopez
Jack A Lopez

11 months ago

There is a lot of chatter out there on this topic.

https://duckduckgo.com/?q=repair+crack+in+bottom+of+fish+tank&ia=web

This page,
https://www.wikihow.com/Repair-a-Leaky-Aquarium

at wikiHow says, basically, (see Step 5) that a crack on the bottom of a tank cannot be fixed without replacing the whole bottom pane of glass.

It seems to me like kind of a pain (a pane?) to have to do that, if you will forgive the pun.

This instructable,

https://www.instructables.com/id/How-to-Fix-a-Cracked-Fish-Tank-Aquarium/

suggests just gluing, with silicone seal, another flat piece of glass, over the crack. This presumes you can find a piece of glass big enough to cover the crack. Also the patch, the new piece of glass, goes inside the tank, and is sort of pressed against the cracked place by the weight of the water when the tank is filled.

My intuition on this, essentially voices in my head, are telling me it might be possible to just glue, with silicone seal, another flat piece, of any kind of strong, flat material, to the underside of the tank, and just seal the cracks above that with silicone seal.

Sort of what I am thinking, is that because no one sees the underside of the tank, the repair in that place can be ugly and opaque, if necessary.