diff --git a/scripts/SimulationParameters/MicrobeStage/Compounds.json b/scripts/SimulationParameters/MicrobeStage/Compounds.json
index 7d6032e0da4..09319747445 100644
--- a/scripts/SimulationParameters/MicrobeStage/Compounds.json
+++ b/scripts/SimulationParameters/MicrobeStage/Compounds.json
@@ -69,5 +69,29 @@
             "g": 0.0,
             "b": 0.078
         }
+    },
+    
+    "Oxygen": {
+        "name": "Oxygen",
+        "volume": 1,
+        "isCloud": false,
+        "isUseful": true,
+        "colour": {
+            "r": 0.078,
+            "g": 0.0,
+            "b": 0.078
+        }
+    },
+    
+    "CarbonDioxide": {
+        "name": "Carbon Dioxide",
+        "volume": 1,
+        "isCloud": false,
+        "isUseful": true,
+        "colour": {
+            "r": 0.078,
+            "g": 0.0,
+            "b": 0.078
+        }
     }
 }