I recently moved my ants into a new nest, 2 days ago, and today, when I peeked at them, I saw this random (yellow/clear?) liquid inside of the formicarium. The liquid seems to surround the place where the ants have been storing their waste. I have no idea why the liquid would suddenly pop up and not go away. Is it formic acid?
The ants also try to avoid it when they walk by, and it's not near any of the hydration ports, so I don't think it has to do with overflowing or condensation. The sugar water I give them is colored blue/green, so it's probably not what they drink either.