Ckline Posted February 8 Share Posted February 8 Hello there, I have a 75 gallon aqueon aquarium that has been up and running for almost 4 years now. I've noticed these blotch marks in the silicone where it kinda looks patchy, like it has bubbled or blistered. Is this seal going bad? I would say its been getting progressively more noticeable within a year. 1 Link to comment Share on other sites More sharing options...
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