Black spot on bottom of resin tank


We’re seeing a large black spot on the bottom of our Form 3 resin tank. It’s completed ~99 small prints but on past tanks we’ve completed many more without failure. We recently changed which Form 3 printer this tank/resin is loaded in, and I believe we saw this failure on the next print. Has anyone seen a similar issue?

This means there’s a small puncture in your tank and resin is leaking between the film layers. Highly caution against continued use of that tank!