Is my rimless tank safe from stress cracking?

[Teeter]

I realized far too late (about three weeks after filling) that my tank has an overhang around the entire perimeter. As you can see in the third pic, the one side has about an inch overhang, the the other side is around 1/4" and is about an 1/8" high. I figured I would set it up the way it was set up in the listing I bought it from, but even looking at that picture you can see the overhang. I'm really not sure what to do here; I've read shimming between the actual tank and the stand is a bad idea, but is the way it's set up now safe? Or is draining and putting a full board under the only choice I have here?

The first pic is the listing, the second and third are how I have it setup currently. Even typing this out, I think I know the answer, but I'm seeing a lot of different answers online.

 

[BristleWormHater]

Drain and put a full board under. I had to drain my tank and move it to a new stand, and it only ended up taking about an hour, not as painful of a process as you might think. I didn't have any fish at that point though. I just rounded up my cuc and put them in large bag then into a styrofoam chest.

 

[Teeter]

Drain and put a full board under. I had to drain my tank and move it to a new stand, and it only ended up taking about an hour, not as painful of a process as you might think. I didn't have any fish at that point though. I just rounded up my cuc and put them in large bag then into a styrofoam chest.

Yeah I figured. Thank you for the response

 

[ingchr1]

Is your tank safe or not from busting a seam? That I cannot answer. However, I have a Waterbox 40-gallon AIO that has three sides that overhang. Been filled since January 2019, no issues to date.

I got my Waterbox 40-gallon AIO in December 2018, and three of my panels are not supported by the stand. The only panel supported is the back one. Looks like this design has changed over the years.

 

[Teeter]

Is your tank safe or not from busting a seam? That I cannot answer. However, I have a Waterbox 40-gallon AIO that has three sides that overhang. Been filled since January 2019, no issues to date.

It’s responses like these that I find that make me confused lol. I think I’m gonna stay on the safe side and put something under, but at the same time, if it wasn’t safe, how could yours stay like that for 5 years?

 

[Doctorgori]

It’s responses like these that I find that make me confused lol. I think I’m gonna stay on the safe side and put something under, but at the same time, if it wasn’t safe, how could yours stay like that for 5 years?

I think the gist of what is being communicated is that that small overhang might not be a big deal….

Red Sea tanks typically overhang over the front by about that much and they hardly ever leak (I’m joking of course)

Anyway, just me, but besides the risk, that would annoy me and my OCD

 

[ingchr1]

It’s responses like these that I find that make me confused lol. I think I’m gonna stay on the safe side and put something under, but at the same time, if it wasn’t safe, how could yours stay like that for 5 years?

Going on six, filled in January 2019.

It could be due to the tank size, the way the stand is built (how the bottom panel is supported), how the panels are attached to each other (including the silicon used), or a combination of factors.

 

[exnisstech]

That would make me nervous. Many tanks have a floating front panel ( I have 2 RS and a WB) but I don't remember ever seeing a tank with the ends not supported.

 

[Teeter]

Going on six, filled in January 2019.

It could be due to the tank size, the way the stand is built (how the bottom panel is supported), how the panels are attached to each other (including the silicon used), or a combination of factors.

That’s fair. I tried contacting the manufacturer, and no response so far, but that seems to be the norm based on other posts I’ve seen about trying to contact them. Without knowing anything from them, I’m guessing the best idea is to be safe.

 

[ingchr1]

That would make me nervous. Many tanks have a floating front panel ( I have 2 RS and a WB) but I don't remember ever seeing a tank with the ends not supported.

Thinking about it, the side panels have outward and not downward force on them. I don't think being in contact with the stand on the bottom provides much if any of the structural support. As long as the bottom panel is full supported and has no chance for any deflection. Typically, the RS tanks fail at the front bottom seam. My guess is the bottom panel is deflecting downward at that point causing the separation. The first photo I posted shows how my Waterbox stand provides support along the front of the bottom panel. Not much chance there for deflection.

 

[Teeter]

Looking under mine, the entire bottom is definitely not supported. Honestly, I'm glad I had this realization before I added any livestock, rather than a year down the line.

 

[exnisstech]

Is your tank safe or not from busting a seam? That I cannot answer. However, I have a Waterbox 40-gallon AIO that has three sides that overhang. Been filled since January 2019, no issues to date.

I'm sorry but you don't have 3 sides over hanging. The front is the only panel not supported by the stand. I have a WB 330.7 and it's the same as yours as far as what panels are on the stand.

 

[ingchr1]

I'm sorry but you don't have 3 sides over hanging. The front is the only panel not supported by the stand. I have a WB 330.7 and it's the same as yours as far as what panels are on the stand.

Did you see the photos I posted? The sides of mine do overhang, there is gap between the sides and the stand. The foam pad only covers the bottom and rear panels.

 

[exnisstech]

Did you see the photos I posted? The sides of mine do overhang, there is gap between the sides and the stand. The foam pad only covers the bottom and rear panels.

Apologies. I just looked at my WB and it does appear the bottom is carrying the load. Mine has an 80 20 stand with wooden panels so it has what appear to be supports on the corners but I'm not sure how much support the wooden panels actually provide.

 

[ingchr1]

My WB 15-gallon AIO is the same, foam pad only covers bottom and rear panels. It's from the 2019 time frame. I have it sitting on a nightstand.