Converting lobster tanks

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Hey everyone, I am considering myself new to the hobby as I havent had a saltwater setup in nearly 20 years and joined the forum to get some help with some lobster tanks I acquired. I'd like to convert them from lobster tanks to some a reef setup and eventually have a mandarin goby since that what got me into the hobby 25+ years ago. I have definitely forgotten more than I remeber. Hopefully somebody here can help me decide how they would be best setup for use in a home, or maybe I am better off starting with a different tank and can use some if the parts from these.