As you progress through Slime Rancher 2, you will undoubtedly want to upgrade your gear to help you reach new areas and survive even longer out in the wilds of Rainbow Island. That is where the Fabricator comes in. This machine, along with some much-needed materials, can be used to craft upgrades for your VacPack to help you be the best Slime Rancher you can be. The Tank Guard is one of the many upgrades you can get and one of the more useful ones. Here is how you unlock the Tank Guard in Slime Rancher 2. Tank Guard location in Slime Rancher 2 Unlike some upgrades like the Resource Harvester\u00a0and Jetpack, the Tank Guard is an upgrade you first need to unlock by obtaining the Tank Liner. This item is found in the wild and protected by a secret door and a Gordo Slime. You're going to have your work cut out for you. Related: How to unlock the Resource Harvester in Slime Rancher 2 Screenshot by Gamepur Go to the area marked on the map above. This is where you will find a cave with a Phosphor Gordo Slime in it. The Slime will be blocking access to the cave. Feed it fruit until it pops to gain access to the rest of the cave. You can easily find fruit just outside of the cave if you don't have any on you. Once the Slime is popped, venture further into the cave to find a door with a Tabby Slime statue next to it. Related: Where to find Angler Slimes in Slime Rancher 2 Screenshot by Gamepur To open the door, you need to fire a\u00a0Tabby Plort\u00a0at the statue. You can get a Tabby Plort by feeding a Tabby Slime some meat. The door will open to reveal a small supply box. Open the box to obtain the Tank Liner and unlock the Tank Guard in the Fabricator. Now, all you need to do is collect the required materials for the upgrade. This upgrade will allow you to keep some of the items in your VacPack if you happen to fall unconscious.