| Product | Graduation | Presentation | Code |
|---|---|---|---|
| Check₂O Aquarium Water Hardness 21 | 0 - 4 - 8 - 16 - 21 od as CaCO₃ | 50 Strips | 349.001 |
Water hardness is often referred to as calcium hardness. Water Hardness can vary across different areas as it is solely dependent on what water is used to fill the aquarium The best range of hardness in an aquarium will depend on what species of fish are being kept or if any breeding is to take place as calcium is critical to fry development.
- SDS (Saftey Datasheet)
- TDS (Technical Datasheet)