An automated aquarium life-support system uses the following algorithm to monitor water parameters and control actuators, but it does not make efficient use of selection structures.

1   WHILE (monitorActive = True) DO
2
3       RECEIVE phSensor FROM PH_SENSOR
4       IF (phSensor > 8.2) THEN
5           SET acidDoseStatus TO "On"
6       END IF
7
8       RECEIVE salinitySensor FROM SALINITY_SENSOR
9       IF (salinitySensor < 32.0) THEN
10          SET saltDoseStatus TO "On"
11      END IF
12
13      RECEIVE dissolvedOxygenSensor FROM DO_SENSOR
14      IF (dissolvedOxygenSensor < 6.5) THEN
15          SET aeratorStatus TO "On"
16      END IF
17
18      IF (phSensor <= 8.2) THEN
19          SET acidDoseStatus TO "Off"
20      END IF
21
22      IF (salinitySensor >= 32.0) THEN
23          SET saltDoseStatus TO "Off"
24      END IF
25
26      IF (dissolvedOxygenSensor >= 6.5) THEN
27          SET aeratorStatus TO "Off"
28      END IF
29
30  END WHILE

Write replacement code to control the aquarium aerator (aeratorStatus) that would improve the efficiency of this algorithm.