The Complete Guide to Minecraft Sponges

Sponges are special water-absorbing blocks in Minecraft that clear out water in their area when placed. You'll find them in ocean monuments and can get them from Elder Guardians. They're essential for underwater building projects, and there are different types and mechanics depending on your version.

What Are Sponges, Exactly?

Sponges come in two varieties: wet sponges and dry sponges. Both absorb water, but only dry sponges actually remove water blocks from the world. Real talk, when you place a dry sponge near water, it absorbs everything within a 7-block radius (that's a cube around it), creating an air pocket you can breathe in. Pretty handy when you're trying to build underwater.

Wet sponges, on the other hand, just sit there. They don't do much in survival mode unless you've got a furnace nearby. Toss a wet sponge into a furnace and you'll get a dry sponge back, plus a little experience if you're lucky.

The color difference between them is visual too. Dry sponges are a yellowish-tan, while wet sponges have that darker, more saturated orange-brown look.

Where to Find Sponges

This is where most players get stuck. You won't find sponges lying around in caves or anywhere else in the world naturally. The only place they spawn is inside ocean monuments, those massive underwater structures that look like they're made of prismarine. They're scattered throughout the structure in a few specific locations, usually in the rooms at the top.

Getting to an ocean monument is the hard part. You'll need to survive the journey to the structure itself, deal with the guardians (annoying fish that shoot lasers), and eventually face off against the Elder Guardian, which is basically the boss of the monument. Defeat that, and you'll get a sponge drop along with other loot. Even better, breaking the wet sponges inside the monument directly gives you them as blocks.

Finding the monument in the first place? Your best bet is looking for it in deep ocean biomes or using the locate command if you're okay with that.

How Water Absorption Works

Place a dry sponge and watch it work. The absorption happens in a cube shape extending 7 blocks out in all directions from the sponge's center. And that means a single sponge covers about 14 blocks total in each direction, depending on what you count. If there's water in that radius, it vanishes instantly.

But here's the catch - the sponge only works once. After it absorbs water, it becomes a wet sponge and stops functioning. You'll need to grab it, dry it in a furnace, and place it again. For large-scale water removal projects, you're looking at placing multiple sponges or doing a lot of furnace runs.

And if the sponge is already placed when you add water nearby, it won't retroactively absorb that new water. You've to place the sponge after the water's there.

Using Sponges for Construction

Underwater base? Sponges are your friend. Want to build in an ocean without breathing underwater the entire time? Place a few sponges in your work area and suddenly you've got an air pocket to work in. Game-changer for underwater architecture.

Clearing flooded caves or dungeons becomes way less tedious with sponges too. No more slowly draining water with sand or gravel. Just place a sponge, collect it once it's wet, dry it, and repeat. If you're setting up a multiplayer server where multiple builders are working on projects, managing water becomes way simpler. You might even want to set up a whitelist for your server if you're running a private build project with a specific group.

There's also the aesthetic angle. Some builders prefer sponge-based water removal over other methods because it's clean, instant, and doesn't leave behind blocks you've to clean up afterward.

Farming Sponges Efficiently

Now, here's where things get interesting. Sponges don't farm like crops. You can't set up an automatic sponge farm the way you'd farm wheat or sugarcane. Your only source is Elder Guardians, and they only spawn in ocean monuments.

Some servers have built massive Guardian farms around ocean monuments. The idea is to create conditions where Guardians spawn constantly, funnel them to a grinder, and harvest their drops. If you've got the patience and resources, you can generate a decent sponge supply this way. It's definitely not a starter project, though.

For most players, collecting sponges from the monument directly is faster. Break the wet sponges you find inside, dry them in a furnace back home, and stack them up for future use. If you need a lot of sponges for a big project, it's worth planning a dedicated monument run.

Java Edition vs Bedrock Edition

They work mostly the same way, but there are some differences worth noting. In Java Edition, sponges have been around since earlier versions and behave consistently. Bedrock Edition added sponges much later and has identical mechanics now, but you might encounter compatibility issues if you're playing on older Bedrock worlds.

The absorption radius is the same in both (7 blocks in each direction). Furnace drying works identically. If you're switching between editions, don't worry about sponge behavior changing on you.

One thing to keep in mind if you're running a public server with both Java and Bedrock players - you might want to use a skin creator tool to ensure your players can customize their characters properly while they're doing sponge runs or other building work together.

Is Sponge Farming Worth It?

That depends on your project scope. Building one small underwater base? Grab the sponges from the nearest ocean monument and you're done. Running a large creative server with tons of underwater construction? Setting up a Guardian farm makes sense long-term.

The barrier to entry is real, though. You need to find a monument, survive the journey, deal with combat, and set up drying infrastructure. For casual players, sponges are more of a "use them when you find them" tool rather than something to actively farm. But they're invaluable when you actually need them, and there's no real substitute for the water-clearing speed they provide.