I wish I would've asked here first! It was totally unnecessary when I changed them, I just wanted the pink o-rings. I was kicking myself after doing so. Thanks for the link!
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I now just replace them if there are leaking issues , it seems the original O ring that sits in the groove on the base stays put but when replacing it with a new one i can't get it to stay put thats all. Now i just leave it alone if the tank is working well.