| 药剂/浓度 | 加药浓度(mg/L) | Ca2+浓度(mg/L) | 防垢率(%) | 目测 |
| 空白 | 0.05 | 480.96 | - | ++++硬垢 浮垢 |
| HYFC-074 | 30 | 561.12 | 88.89 | - |
| HYFC-027 | 30 | 562.12 | 90.00 | - |
| YFFG-037 | 30 | 561.52 | 89.33 | - |