Hello everybody.

I just came back to the aquarium hobby after a decade or so and found this forum very helpful in setting up my tank.
Normally i would like to start with an introduction and filling in my profiles and everything but i need some opinions as soon as possible.

since about a month now i have a 120l juwel tank that i got from a friend of mine after he used it a couple years.

Today when i was cleaning the tank i noticed that the side panel of the tank is sticking out a bit. it's only the front left vertical seam, all the other seams are squared. it looks like it's pushed out a bit.
i don't know if it was like this when i got it but now i've seen it, it freaks me out a bit.

Could anyone tell me if i need to be concerned or not?

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OK, I'll take a shot here.

Since there's no before and after picture possible here, there's no way to tell if it was assembled in that fashion, or if in fact the inner bead is compromised and has started to shift. A side view of that seam looking through the side panel (from the right side of the top-down view) would be helpful. If it is in fact compromised and shifting it would look very different from the other four seams, and you should be worried. If that is the case, the panels are being held together by the outer silicone bead with the inner bead being totally compromised. That would not be good.

Thank you for your response.
I know it is hard to tell by sight but i thought maybe somebody had the same thing happened.

I made a couple more photo's of the seam, maybe you can see more on these.

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the other seams look the same. only difference is that the glass is square on all other seams with only a bit of silicone coming out.
Is there a possibility that the whole panel comes bursting out or something?

I don't want to risk it leaking so if there is any concern i would like to know.

The second picture is a little clearer. I personally think the panels were poorly aligned at assembly. If the inner bead had failed it would appear much lighter in color than the others. Would I worry about it? A little bit certainly. Mostly in the way the tank is handled. In moving it, I would be more concerned about that corner.

I have to say it's an odd construction even for a rimless. It seems like two totally different thicknesses in the those panels. If those dimensions were to be employed, I would've thought the thinner panel would overlap the thicker one rather than abut it. It may not be aesthetically pleasing, but the inner silicone bead would be much stronger.

it is a strange construction indeed, but if there are no signs of a compromised seal then i hope i don't have to worry that much.

Because i don't know if i got it like this i have nothing to compare it with. I measured it sticks out 2mm, just less then half the side panel and if it gets any more i'll know it is moving and have the seam resealed.
I can't do any more i guess.

thank you for the advise.

I tend to agree. It seems to have been poorly aligned in assembly. Just take some extra precautions with it if you ever move around in the future. Best of luck with it.

Yeah, I would be decommissioning that one...

It looks a bit scary to me, if you can afford it I would get another. If not perhaps place it somewhere without carpet/rugs/hardwood floors just in case it decides to spring a leak.