I'm sorry, I have been through this as well. Depending on where the leak is you might be able to patch it.
If you can keep the rocks wet you won't have to re-cycle the aquarium.
When it happened to me, I bought a new tank. I didn't want to chance a patch and another fail.
Sorry your going through it. In 18 years it's happened to me once.
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120g mixed reef
90g QT
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