Well, I'm going to have to scrape out all the silicone because unfortunately, you can't just patch it. Just unsure of how this happened, I used LOADS of silicone and made sure it was thick on both sides to prevent this from happening. Months without an issue. Just irritated right now! I drained the drainage layer last night and it is about half full again.

Edit - on second thought, I'm just going to keep draining the drainage layer as it leaks into it until it stops so I can guesstimate at least what level the leak is, then I can rip apart a little less. If it's at the bottom though, I'm out of luck.