cost $60 / $90 $60 / $90 $75 $145 $50 $85 (Includes 2 filters) Category Rating 5 3 3 3 Electrical Supply Transformer 'fransfonner SMPS Transformer SMPS SMPS Power Consumption 110w / .5amps 110w / .5amps 200w 230w / 2.5amps unknown 85w Category Rating 5 5 4 5 4 4 Number of pH levels