The barrel has a wide range of uses. You can use it to compost organics into dirt, transform one fluid into another, transform a fluid into a block with an item, and spawn mobs. When in the rain, the barrel will collect water. Right click the barrel to get a block out of the barrel. Right click the barrel with a bucket to add or remove a fluid.
Wood barrels cannot accept hot fluids. Stone barrels can accept hot fluids. Water has a temperature of 300. Anything over 433 will not go into a wood barrel.
Warning
Once a compost item is in the barrel, it cannot be removed. A barrel will void any fluid in it when it is broken.
Recipe
6x Wood Plank (Any)
1x Wood Slab (Any)
6x Stone
1x Stone Stab
Fluid Transformation
The combination of some fluids and blocks will interact and transform the fluid in the barrel. The barrel must be full of the fluid and the block placed directly below the full barrel.
Fluid
Block
Water
Sand
Fluid
Block
Water
Mycelium
Fluid Block Transformation
When certain blocks or items are right clicked on a full barrel, the fluid will transform into a solid block consuming the block or item.
Fluid
Item
Sea Water
Brain Coral Seed
Fluid
Block
Sea Water
Brain Coral Fan
Fluid
Item
Sea Water
Bubble Coral Seed
Fluid
Block
Sea Water
Bubble Coral Fan
Fluid
Block
Water
Dust
Fluid
Item
Lava
Glowstone Dust
Fluid
Item
Sea Water
Fire Coral Seed
Fluid
Block
Sea Water
Fire Coral Fan
Fluid
Item
Sea Water
Horn Coral Seed
Fluid
Block
Sea Water
Horn Coral Fan
Fluid
Item
Lava
Redstone Dust
Fluid
Item
Witchwater
Red Mushroom
Witchwater
Brown Mushroom
Fluid
Block
Witchwater
Sand
Fluid
Item
Sea Water
Tube Coral Seed
Fluid
Block
Sea Water
Tube Coral Fan
Fluid On Top
Filling the barrel with a fluid and placing another fluid in the block space above the barrel will result in the fluid in the barrel becoming solid.
Fluid In Barrel
Fluid On Top
Water
Lava
Fluid In Barrel
Fluid On Top
Lava
Water
Mob Spawning
Mobs can be spawned from the barrel by filling it with a specific fluid and right clicking the appropriate doll onto the barrel.
Doll
Fluid
Buzzing Doll
Witchwater
Doll
Fluid
Blazing Doll
Lava
Doll
Fluid
Creeping Doll
Witchwater
Doll
Fluid
Protecting Doll
Water
Doll
Fluid
Floating Doll
Witchwater
Compostable Blocks and Items
The following are items and blocks that can be composted. A barrel begins composting when it reaches a solid amount of 1000.