Calcium fluorideCalcium Fluoride is an inevitable component of electrolyteElectrolyte in the Hall-Héroult process for primary aluminum productionAluminum production due to calcium impuritiesImpurities in the consumed raw materials. The high partition coefficient of calcium between electrolyteElectrolyte and aluminumAluminum metalMetals reinforces the importance of tracking inputs of this element. CaF2 aids the process by reducing the liquidus and therefore operating temperatures. Its negative impacts on aluminaAlumina solubility and electrical conductivityElectrical conductivity are generally acceptable when the calcium fluorideCalcium Fluoride content of the bath is kept between 4.5 to 6.5 wt.%. Of additional concern is its impact on the density of electrolyteElectrolyte, bringing it closer to that of the molten aluminumAluminum metalMetals. In this paper, it has been proposed that there is a demonstrable, negative impact on the amount of electrolyteElectrolyte that is entrained with metalMetals during siphoning, especially with reduction cellsReduction cell that do not have deep metalMetals levels. This is an undesirable outcome for multiple reasons.