Coral Tube Sample

+# Coral Tube Sample+ +![Coral Tube Sample](https://wiki.subnautica.com/sn/images/Coral_Tube_Sample.png?8162e)+ +## Description+Sample containing CaCO3. Calcium carbonate is a base ingredient for bleach.+ +## Acquisition+**Acquired From:**+*   Giant Coral Tubes+*   Coral Shell Plates+ +**Method:** Harvest with the Survival Knife.+ +**Size:** 1+ +**Biomes:**+*   Bulb Zone+*   Crash Zone+*   Main Crash Zone+*   Crash Zone Mesas+*   Grassy Plateaus+*   Grassy Plateaus Caves+*   Kelp Forest+*   Mountains Caves+*   Mushroom Forest Caves+*   Safe Shallows+*   Safe Shallows Caves+*   Underwater Islands+ +**Debug Spawn Name:** `coralchunk`+ +## Uses+### Crafting+Used to craft **Bleach** in the Fabricator.+ +| Salt Deposit | Coral Tube Sample | → | Bleach |+| :---: | :---: | :---: | :---: |+| ![Salt Deposit](https://wiki.subnautica.com/sn/images/thumb/Salt_Deposit.png/54px-Salt_Deposit.png?68995) | ![Coral Tube Sample](https://wiki.subnautica.com/sn/images/thumb/Coral_Tube_Sample.png/54px-Coral_Tube_Sample.png?8162e) | → | ![Bleach](https://wiki.subnautica.com/sn/images/thumb/Bleach.png/54px-Bleach.png?4a08f) |+ +### Energy Value+Can be used as fuel in the **Bioreactor**.+ +*   **+70 Energy** per sample+ +## Gallery+![Coral Tube Samples can be harvested from Giant Coral Tubes](https://wiki.subnautica.com/sn/images/thumb/CoralSampleLocationTubes.png/200px-CoralSampleLocationTubes.png?871bd)+Coral Tube Samples can be harvested from Giant Coral Tubes+ +![A Coral Tube Sample in game](https://wiki.subnautica.com/sn/images/thumb/CoralChunkInGame.png/200px-CoralChunkInGame.png?c0980)+A Coral Tube Sample in game+ +## Trivia+The former names for the Coral Tube Sample were the Common Coral Sample, and before that, the Coral Sample. At some point in development it was known as the Coral Chunk.