Is this a separation in my seam?

[Lelegance]

For context, it is a rimless waterbox 180.5 with 3-4” glass. This is what i have been seeing: a reflective area in the seam ~2mm thick that follows the seam for 3in. Looking from the side panel at an angle towards the seam it is easily visible. I cannot see it directly on as there is vinyl on the back blocking that view. I can cut away some of the vinyl on the back to get a better view, but this is worrying to me. Here is the pictures:

 

[UncommonSense]

This is an abnormal spot for a seam to start peeling on a rimless tank…

Is it possible that it’s damage from scraping the rear glass?

Other than that, did the stand get leveled out thoroughly during the tank install? Also, is the floor lumber framed, or a concrete slab?

Regardless, this doesn’t look particularly alarming so far, I’d recommend continuing to monitor for any size increase…

 

[Lelegance]

This is an abnormal spot for a seam to start peeling on a rimless tank…

Is it possible that it’s damage from scraping the rear glass?

Other than that, did the stand get leveled out thoroughly during the tank install? Also, is the floor lumber framed, or a concrete slab?

Regardless, this doesn’t look particularly alarming so far, I’d recommend continuing to monitor for any size increase…

Level is good, 1mm lower on front left side, -3mm on front right side, bot corners in the back are a little higher which makes sense because that is the side with the load bearing wall. Side to side level on front glass is dead on, back side to side is -0.5mm on left side. When the tank was installed, front to back level was -1mm on right side in the front. Left side close to dead level. So not much change there. Here is a picture i just took after peeling a bit of vinyl off the back near the seam, no super visible bubbling or separation no matter the angle. Slightly lighter colored area of seam towards the inside which seems to be lightling from the tank. Looking at the spot separated, it seems to be the seam between the side panel and back panel, on the side where it bonds to the back panel. I cannot see the separation from the other side easily meaning the bubble may not have started on the outside part of the seam, but the inside part. Let me know if that’s confusing its hard to explain.

 

[Lelegance]

This is an abnormal spot for a seam to start peeling on a rimless tank…

Is it possible that it’s damage from scraping the rear glass?

Other than that, did the stand get leveled out thoroughly during the tank install? Also, is the floor lumber framed, or a concrete slab?

Regardless, this doesn’t look particularly alarming so far, I’d recommend continuing to monitor for any size increase…

Sorry, forgot to answer the rest of your questions was too busy checking the level. It is on a wood framed floor, and damage could be caused by a scraper going vertically while cleaning, but that is a fairly deep cut for a mistake. I wouldn’t put it past the previous owner because they were not careful around the seams, and some of the cosmetic silicone on the front seams has visible damage. Ill continue monitoring, i only noticed it a week ago. Im just hoping it doesn’t progress, and that it wont make an issue as I’ve committed a lot to this tank.

 

[UncommonSense]

Level does sound pretty darn close… within 1/8”…

Assuming the floor isn’t sagging over time in that front right corner (you can inspect framing and add support posts as needed), I’d just continue to monitor periodically for signs of growth!