| Metals | Concentrations in Water Samples (ppm) | |||
| RAW | ZEO | STOX-Z | ZEO-T | |
| K | 1.450 | 1.600 | 1.250 | 0.650 |
| Ni | 0.023 | 0.016 | 0.045 | 0.000 |
| Ca | 24.500 | 25.550 | 24.700 | 26.400 |
| Na | 6.400 | 8.050 | 8.200 | 6.650 |
| Mg | 5.000 | 5.150 | 13.250 | 3.400 |
| Mn | 0.034 | 0.034 | 0.045 | 0.030 |
| Cd | 0.019 | 0.041 | 0.013 | 0.019 |