Aquarium model 19 - Aquarium 2 water levels

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Information:
Level 2 of Tank may be used in these cases
- Winter savings cost of heating
- Reducing water levels when using fish medicine
- Reduce water pressure when fish are small
At level 1 of the tank
Water level when the pump is not running = 60cm
Water level when operating pump = 63cm
Lock 1 = Lock
Key 2 = 90% Water
Key 3 = Lock
At Level 2 of the tank
Wet water when the pump is not working = 40cm
Water level when operating pump = 43cm
Key 1 = 90% Water
Lock 2 = Lock
Lock 3 = Unlock
Note: At level 2 of the tank you have to close a ventilation hole as in the Clip, this ensures the water works perfectly.
Tank info:
155cm*70cm*70cm ( Glass 12mm )
filter tank: 130cm*45cm*45cm ( Glass 8mm and 5mm )
Pump 5500L/h