Should i be concerned about this hairline bubbling/hazing in acrylic seams?

[Fitz19d]

110 tall, has these little bubbles/hazing along the seams. panic or just normal for a used acrylic. Filled I noticed some slight bowing along the 4 foot edge. It's eurobraced with a center brace.

 

[LED Jack]

Ouch, the bowing is normal but I would not use that tank just from what I see on those 2 pictures.

 

[xanthurum]

The crazing is from when it was flame polished and just cosmetic. The other seam looks worrisome to me and I actually do acrylic tanks for my job.