diff --git a/main.py b/main.py
index 192ab51..94edd16 100644
--- a/main.py
+++ b/main.py
@@ -110,7 +110,7 @@ def format_PU_data(data):
 def format_DS_data(data):
     return {
         "timestamp": datetime.datetime.now().isoformat(),
-        "Qconso": np.round(data.get("Qdrain_sp", 0.0), 1),
+        "Qconso": np.round(data.get("Inlet_flow", 0.0), 1) - np.round(data.get("Outlet_flow", 0.0), 1),
         "TankLevel": np.round(data.get("TankLevel", 0.0), 2),
         "Qinlet": np.round(data.get("Inlet_flow", 0.0), 1),
         "Qoutlet": np.round(data.get("Outlet_flow", 0.0), 1),