Hello guys I saw a post Asking about a replacement tank for glass for the Hercules tank after changing tanks with everything I own I found out that the extra tank you get with the Uwell Crown tank will fit perfectly. So worst-case scenario if you have to buy a Uwell Crown tank which happens to be a great tank in itself will also be able to use the second tank that it comes with to make it Hercules operational again. Hope this helps any feedback would be great glad to be here hope that this helps somebody
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