# Seaweed - Stage 3 (technology) internal name `seaweed-mk03` · tier 4 (pY science pack 2, [tier 4](https://factorio.kalzumeus.com/tier/4.md)) HTML page: https://factorio.kalzumeus.com/tech/seaweed-mk03/ ## Cost 450 units of (1 × [pY science pack 2](https://factorio.kalzumeus.com/item/py-science-pack-2.md), 2 × [Logistic science pack](https://factorio.kalzumeus.com/item/logistic-science-pack.md), 3 × [pY science pack 1](https://factorio.kalzumeus.com/item/py-science-pack-1.md), 6 × [Automation science pack](https://factorio.kalzumeus.com/item/automation-science-pack.md)), 90 s each. ## Requires (2) - [pY science pack](https://factorio.kalzumeus.com/tech/py-science-pack-2.md) - [Seaweed - Stage 2](https://factorio.kalzumeus.com/tech/seaweed-mk02.md) ## Leads to (1) - [Seaweed - Stage 4](https://factorio.kalzumeus.com/tech/seaweed-mk04.md) ## Unlocks (2 recipes) ### Seaweed (`seaweed-3`) - 30 s · tier 4 · productivity modules allowed - Ingredients: 100 × [Saline water](https://factorio.kalzumeus.com/fluid/water-saline.md), 100 × [Carbon dioxide](https://factorio.kalzumeus.com/fluid/carbon-dioxide.md), 50 × [Slaked lime](https://factorio.kalzumeus.com/fluid/slacked-lime.md), 1 × [Fertilizer](https://factorio.kalzumeus.com/item/fertilizer.md) - Results: 30 × [Seaweed](https://factorio.kalzumeus.com/item/seaweed.md) - Made in: Seaweed crop facility MK 01, Seaweed crop facility MK 02, Seaweed crop facility MK 03, Seaweed crop facility MK 04 - Unlocked by: [Seaweed - Stage 3](https://factorio.kalzumeus.com/tech/seaweed-mk03.md) ### Seaweed MK 03 (`seaweed-mk03`) - 25 s · tier 4 - Ingredients: 200 × [Saline water](https://factorio.kalzumeus.com/fluid/water-saline.md), 10 × [Molybdenum trioxide (MoO3)](https://factorio.kalzumeus.com/item/molybdenum-oxide.md), 1 × [Fertilizer](https://factorio.kalzumeus.com/item/fertilizer.md), 5 × [Seaweed MK 02](https://factorio.kalzumeus.com/item/seaweed-mk02.md), 75 × [Tailings](https://factorio.kalzumeus.com/fluid/tailings.md) - Results: 1 × [Seaweed MK 03](https://factorio.kalzumeus.com/item/seaweed-mk03.md) - Made in: Seaweed crop facility MK 01, Seaweed crop facility MK 02, Seaweed crop facility MK 03, Seaweed crop facility MK 04 - Unlocked by: [Seaweed - Stage 3](https://factorio.kalzumeus.com/tech/seaweed-mk03.md)