Air bubbles in internal silicone?

[Kamreefer]

Hi guys i need help picked up a used 90g when i got home i nitived the internal silicone has been scraped off in areas over the years of use. well to day i filled the tank im noticing in the left corner there are airbubbles when u look at it when i press on the air bubbles theybseem to sperate whoch makes me think its not the seams? am i ok or do i need a new tank? thanks for your time

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