Acquired a 150? Gallon aquarium, leaking issues

islandguy85

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I recently acquired an aquarium from a friend. I believe it was a kit build and is 3/4" acrylic 48x30x22". He had it in his house for the last 2.5 yrs and was over it. It was not leaking in his house as I was there to see it. Presumably, during the move it may habe gotten tweaked? And now is leaking I would say 1/2 gallon maybe every 8 hours? I have since drained the tank. I am hoping there is a way to salvage this tank as I have already invested a fair amount of effort getting it to my house and cleaning it etc. I read that people suggested welding acrylic triangle rod in the corners which seemed like a possibility, but the corners are not perfectly square on the insides I would say due to the orignal epoxy/welding of the tank. Are there any sealants I could try to use to close up these leaks? I pulled wood trim off from around edges and can see areas that are bubbled/opaque. I will try to include pictures. It appears to be leaking around the bottom where I cant really see and not from any of the sides. I am not opposed to using something that is not perfectly clear if need be as the bottom will be covered by black sand that was included. I also have a large amount of rock,a water chiller and heater, and all the necessary pumps etc. would something like the epoxy in the picture work? I have used this to patch holes on aluminum boats which I know is different bt figured it may be worth a shot? Any help is greatly appreciated!
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Acrylic tanks and parts are fused together with a solvent. So there is no glue or epoxy used in its design. If you know where it is leaking, you can use the solvent to fuse the parts back together.

I am not sure what I have used in the past, I just went to the plastics store (check your local industrial parks) and they put some in a small bottle for me. Then I used a blunt medical grade needle and syringe to apply it, then clamp the part. This product seems similar to what I have used:

https://www.amazon.com/SCIGRIP-10308-Acrylic-Solvent-Water-thin/dp/B00JFPF0UQ

Failing that, epoxy would work, as it is water tight if applied correctly; just make sure you get the stuff that bonds to acrylic. I am not sure if that is standard or not...

However, if the tank is not square and level, you will likely have issues down the road when the tank is full.
 
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. This is what I meant to post w the first. I should be able to level it without too much issue, it is sitting on flat slab currently on a heavy steel stand.
 
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Following up on this tank. I used fast set weld on 4 and went around all of the seams with a 23g syringe and slowly injected the solvent into any gaps. I did this four or five separate times over a week or so. I could see the solvent filling voids. I reset all of the plumbing and filled er up. Tank has been holding for appx one week and not a single drop from a leak.
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