User blog:Maxfield, the Garryfish with PTSD/Base Collapsing, Don't know why... Help?

I need someone that knows the ins and outs of Subnautica. Because this one's a bit of a doozy.

You see, I recently built a new Seabase between the Blood Kelp Zone and the Safe Shallows. I started off OK, with one multi-purpose room, and a few other attachments. But the moment I added the Moonpool,​ everything went to hell.​ The hull began to fill with holes, and I found myself struggling to keep the base in one piece. I covered every inch ​that I could with reinforcement, and it still fell apart. I don't know what's wrong... But if I don't figure it out soon, my base will be a giant aquarium!​

Any tips would be appreciated, thank you!