20 gallon tank bowing in the middle

[0rangeFish]

I have a 20 gallon breeder from Petco that's been setup for a month now. I noticed the other day that is blowing in the center. The difference is 3/16" between the ends and the center. The glass isn't tempered glass as I've drilled the back. I did find two bubbles in one of the silicone seams, but that was it. The internet seems to be pretty split on this issue, but all the post I read were for 40 gallon tanks. I just thought it was odd for such a small tank to bow.

 

[ndrwater]

A bit odd, but doesn't sound catastrophic. If it is a real concern, especially since the tank is new, you might hit up Petco to see their thoughts. Worst case, swap out the tank... Probably under warranty

 

[0rangeFish]

I've had the tank for years and just now decided to make it into a permanently set up tank so it's not under warranty anymore, also I drilled two holes in the back. I found some posts of people asking Petco, all they said was the tank needs to be on a marineland or a aqueon stand to properly support it. I dont have it on one of their stands, but I highly doubt that's the cause of the bowing.

 

[ndrwater]

Forgot about the drilled part.. even still, doubt it's catastrophic. Like I said earlier, a 20 gallon tank is relatively cheap, so if it's a big concern, maybe swap it.

 

[ca1ore]

That would seem like normal bowing. Keep in mind that each panel is only bowing out by half of 3/16. Too many online hysterics LOL.