Description
Genuine LaMotte Saltwater SpinDisk® Reagent Cartridges (4354-H)
The LaMotte 4354-H is a box of 50 single-use saltwater SpinDisk® reagent cartridges for the WaterLink® Spin Touch® photometer. Each sealed disk contains the exact reagents needed for a complete marine water panel — including the calcium and magnesium tests that matter most in saltwater aquaculture, marine hatcheries and reef systems.
Inject less than 3 mL of sample water into the disk, insert it into your Spin Touch, and press start. In around 2 minutes the photometer completes all eight tests automatically — no titration, no reagent measuring, and no operator-to-operator variation.
The FX203 saltwater series is calibrated for marine water with salinity between 17,000 and 45,000 ppm.
What each disk tests
| Test Factor | Range | Accuracy |
|---|---|---|
| Alkalinity | 0 – 300 ppm (17.0 dKH) | ± 15% |
| Ammonia | 0.0 – 3.0 ppm | ± 0.2 ppm (< 1 ppm), ± 0.4 ppm (> 1 ppm) |
| Calcium | 200 – 800 ppm | ± 15% |
| Magnesium* | 500 – 2,200 ppm | ± 15% |
| Nitrate | 0 – 60 ppm | ± 25% |
| Nitrite | 0.0 – 2.0 ppm | ± 0.2 ppm |
| pH | 6.5 – 10.0 | ± 0.2 |
| Phosphate | 0.0 – 2.0 ppm | ± 0.2 ppm |
*Magnesium is not reported when testing brackish samples with the Brackish Tablet method.
Key details
- Pack size: 50 single-use disks, individually foil-sealed
- Sample size: less than 3 mL per test
- Test time: approx. 2 minutes for all 8 parameters
- Salinity range: 17,000 – 45,000 ppm (marine); 10–20 ppt brackish with Brackish Tablet Package (3865-PKG)
Pure Aquatics stocks genuine LaMotte SpinDisk® reagent cartridges in Australia with local support on (02) 6585 2421.




