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Fish Tank
The Fish Tank is a decorative block that displays items inside a glass-walled enclosure. You can place almost anything inside — fish, blocks, or other items — and fully customize the tank's frame, floor, and glass.
Recipe — Fish Tank
| Iron Ingot | Glass | Iron Ingot |
|---|---|---|
| Glass | Glass | |
| Iron Ingot | Glass | Iron Ingot |
Yields: 1× Fish Tank
Craft or obtain a Fish Tank block and place it like any other block. A single fish tank is one block in size and holds up to 27 items (same as a chest).
| Action | Result |
|---|---|
| Right-click holding an item | Add one copy of that item to the tank |
| Right-click with empty hand | Remove the most recently added item |
Items are displayed inside the tank facing toward the player who placed them.
Place two fish tanks adjacent to each other (any face) and they will automatically merge into a larger enclosure. Open faces between adjacent tanks disappear, creating a seamless multi-block tank. This works in all six directions.
Items with a size greater than 100 cm (see Fish Species) cannot fit in a single-block tank. You need a connected arrangement that is at least:
- 3 blocks wide
- 3 blocks tall
The tank will reject oversized items and explain why in the chat.
Each fish tank has three visual parts you can change independently:
| Part | Default |
|---|---|
| Frame (corners and edges) | Oak Planks |
| Sand (floor) | Sand |
| Glass (side panels) | Blue Clear Stained Glass |
- Set your customization mode to the part you want to change (Frame, Sand, or Glass).
- Hold the block you want to apply.
- Right-click the tank — that part updates immediately.
The chat confirms the change and shows the block registry name.
Note: Some blocks may be blacklisted for specific parts in the server config. If a block is blocked, the tank will tell you.
The active customization mode (Frame / Sand / Glass) is tracked per-player. Switch modes using whatever method your modpack or server setup exposes (check your keybinds or the mod's configuration). The current mode determines which part of the tank is affected when you right-click with a block.
Fishtastic adds two families of glass blocks designed for tank walls:
| Family | Description |
|---|---|
| Borderless Stained Glass | Stained glass with no visible frame border — tiles seamlessly |
| Clear Stained Glass | Tinted glass with a more transparent/clear texture |
Both families exist for all 16 dye colors plus undyed variants (Borderless Glass and Clear Glass).
Recipes — Special Glass Blocks
Borderless Stained Glass — Shapeless, 1 ingredient:
- 1× [Color] Stained Glass → 1× [Color] Borderless Stained Glass
Clear Stained Glass — Shapeless, 2 ingredients:
- 1× [Color] Stained Glass + 1× Glass → 1× [Color] Clear Stained Glass
Replace [Color] with any of the 16 dye colors (white, orange, magenta, light blue, yellow, lime, pink, gray, light gray, cyan, purple, blue, brown, green, red, black).
These blocks behave like vanilla stained glass for all other purposes (light transmission, beacon beams, etc.).
When you add an item to the tank, it is rotated to face the player's position at the time of insertion. This creates a natural "facing the viewer" display. The rotation is stored per-item so it persists through world reloads.