diff --git a/modular-recipes/repos/minimal_hydroponics_setup/minimal_hydroponics_setup.toml b/modular-recipes/repos/minimal_hydroponics_setup/minimal_hydroponics_setup.toml
index 9a2dc0b..106a42d 100644
--- a/modular-recipes/repos/minimal_hydroponics_setup/minimal_hydroponics_setup.toml
+++ b/modular-recipes/repos/minimal_hydroponics_setup/minimal_hydroponics_setup.toml
@@ -6,8 +6,7 @@ grow_lights = {}
 tasmota_power_outlet = { quantity = { amount=2 } }
 hose_1_inch = { quantity = { amount=1, unit="Meter" } }
 hose_1_2_inch = { quantity = { amount=1, unit="Meter" } }
-nutrient_concentrate = { quantity = { amount=1, unit="Liter" } }
-ph_up_down = { quantity = { amount=1, unit="Liter" } }
+nutrient_solution = { quantity = { amount=5, unit="Liter" } }
 
 [dependencies]
 operator = { skills=["assembly"] }
diff --git a/modular-recipes/repos/minimal_hydroponics_setup/nutrient_solution.toml b/modular-recipes/repos/minimal_hydroponics_setup/nutrient_solution.toml
new file mode 100644
index 0000000..0be8539
--- /dev/null
+++ b/modular-recipes/repos/minimal_hydroponics_setup/nutrient_solution.toml
@@ -0,0 +1,12 @@
+[outputs.nutrient_solution]
+quantity = { amount=5, unit="Liter" }
+
+[dependencies]
+
+[inputs]
+nutrient_concentrate = { quantity = { amount=1, unit="Liter" } }
+ph_up_down = { quantity = { amount=1, unit="Liter" } }
+water = { quantity = { amount=3, unit="Liter" } }
+
+[action]
+process = "Mix everything together in the nutrient reservoir."
diff --git a/modular-recipes/repos/minimal_hydroponics_setup/water.toml b/modular-recipes/repos/minimal_hydroponics_setup/water.toml
new file mode 100644
index 0000000..7e55e99
--- /dev/null
+++ b/modular-recipes/repos/minimal_hydroponics_setup/water.toml
@@ -0,0 +1,9 @@
+[inputs]
+capital={quantity={amount=0.01, unit="USDollar"}}
+
+[dependencies]
+
+[action.purchase]
+vendor = [
+    "Water comes from the tap."
+]