The TCS-1000 will alarm if the water level falls below the "Min" water level. The unit uses an electrical circuit to detect the level of the water. Sometimes extremely pure water, which is not conductive at all, will cause the TCS to not be able to detect the water level and display the E03 error message. Deionized “pure” H2O molecules need atmospheric CO2 to be conductive to the sensors. The sensors will work normally if the water is equilibrated by aerating or adding some tap water. The added electrolytes in the tap water will allow for the needed conductivity and won't negatively affect the longevity of your mixed chemistry. READ MORE...
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