diff --git a/constant/physicalProperties b/constant/physicalProperties
index 98f8a6b..e0c2b41 100644
--- a/constant/physicalProperties
+++ b/constant/physicalProperties
@@ -77,7 +77,26 @@ wallIonFluxes
 {
     ions
     (
+        H3O()
+        HCO()
     );
 
+    H3O()
+    {
+        noTarget true;
+        neutrals (He);
+        wallPatches         (nzLow nzUpp coLow coUpp);
+        wallReflexes        (0 0 0 0);
+    }
+
+    HCO()
+    {
+        noTarget true;
+        neutrals (He);
+        wallPatches         (nzLow nzUpp coLow coUpp);
+        wallReflexes        (0 0 0 0);
+    }
+
+
 }
 // ************************************************************************* //