diff --git a/rust/src/main.rs b/rust/src/main.rs
index 7293148..db1e76f 100644
--- a/rust/src/main.rs
+++ b/rust/src/main.rs
@@ -611,7 +611,7 @@ fn determine_state_target_moisture_for_plant(
     plant: usize,
     state: &mut PlantState,
     config: &PlantControllerConfig,
-    tank_state: &TankInfo,
+    tank_state: &TankState,
     cur: DateTime<Tz>,
 ) {
     let plant_config = &config.plants[plant];
@@ -657,10 +657,17 @@ fn determine_state_target_moisture_for_plant(
 
     if a_low || b_low {
         state.dry = true;
-        if tank_state.sensor_error && !config.tank.tank_allow_pumping_if_sensor_error {
-            //ignore is ok
-        } else if !tank_state.enough_water {
-            state.no_water = true;
+        match tank_state.enough_water(&config.tank) {
+            Err(_tank_err) => {
+                if !config.tank.tank_allow_pumping_if_sensor_error {
+                    // ignore is ok
+                    // wtf does this meen, shouldn't something happen if the configuration specifies
+                    // that no water should flow if there was an error?
+                }
+            },
+            Ok(enough_water) => {
+                state.no_water = !enough_water
+            },
         }
     }
     let duration = TimeDelta::try_minutes(plant_config.pump_cooldown_min as i64).unwrap();
@@ -701,7 +708,7 @@ fn determine_state_timer_only_for_plant(
     plant: usize,
     state: &mut PlantState,
     config: &PlantControllerConfig,
-    tank_state: &TankInfo,
+    tank_state: &TankState,
     cur: DateTime<Tz>,
 ) {
     let plant_config = &config.plants[plant];
@@ -716,10 +723,15 @@ fn determine_state_timer_only_for_plant(
                 state.next_pump = Some(europe_time);
                 state.cooldown = true;
             } else {
-                if tank_state.sensor_error && !config.tank.tank_allow_pumping_if_sensor_error {
-                    state.do_water = true;
-                } else if !tank_state.enough_water {
-                    state.no_water = true;
+                match tank_state.enough_water(&config.tank) {
+                    Err(_tank_err) => {
+                        if !config.tank.tank_allow_pumping_if_sensor_error {
+                            state.do_water = true;
+                        }
+                    },
+                    Ok(enough_water) => {
+                        state.no_water = !enough_water;
+                    },
                 }
             }
         }
@@ -739,7 +751,7 @@ fn determine_state_timer_and_deadzone_for_plant(
     plant: usize,
     state: &mut PlantState,
     config: &PlantControllerConfig,
-    tank_state: &TankInfo,
+    tank_state: &TankState,
     cur: DateTime<Tz>,
 ) {
     let plant_config = &config.plants[plant];
@@ -762,10 +774,15 @@ fn determine_state_timer_and_deadzone_for_plant(
                 state.out_of_work_hour = true;
             }
             if !state.cooldown && !state.out_of_work_hour {
-                if tank_state.sensor_error && !config.tank.tank_allow_pumping_if_sensor_error {
-                    state.do_water = true;
-                } else if !tank_state.enough_water {
-                    state.no_water = true;
+                match tank_state.enough_water(&config.tank) {
+                    Err(_tank_err) => {
+                        if !config.tank.tank_allow_pumping_if_sensor_error {
+                            state.do_water = true;
+                        }
+                    },
+                    Ok(enough_water) => {
+                        state.no_water = !enough_water;
+                    },
                 }
             }
         }
@@ -783,7 +800,7 @@ fn determine_state_timer_and_deadzone_for_plant(
 fn determine_plant_state(
     plantstate: &mut [PlantState; PLANT_COUNT],
     cur: DateTime<Tz>,
-    tank_state: &TankInfo,
+    tank_state: &TankState,
     config: &PlantControllerConfig,
     board: &mut std::sync::MutexGuard<'_, PlantCtrlBoard<'_>>,
 ) {
diff --git a/rust/src/tank.rs b/rust/src/tank.rs
index c09baa4..3a7e223 100644
--- a/rust/src/tank.rs
+++ b/rust/src/tank.rs
@@ -123,6 +123,12 @@ impl TankState {
         }
     }
 
+    pub fn got_error(&self, config: &TankConfig) -> Option<TankError> {
+        match self {
+            TankState::TankSensorPresent(raw_value_mv) => raw_voltage_to_tank_fill_percent(*raw_value_mv, config).err(),
+            TankState::TankSensorDisabled => Some(TankError::SensorDisabled),
+        }
+    }
 
 }