Why the Mastertronic Essential?
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All‑in‑one design: No need for separate testers; one device monitors nitrate, phosphate, calcium, alkalinity, magnesium and OLI. A space‑saving unit means more room in your cabinet.
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Lab‑grade accuracy: Using high‑precision stepper and DC pumps with a colorimetric photosensor, it delivers reliable results comparable to laboratory tests. Precision figures include ±0.5 ppm for nitrate, ±0.01 ppm for phosphate, ±0.1 dKH for alkalinity, ±20 ppm for magnesium and ±6 ppm for calcium.
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Real‑time data & trends: Connect the unit wirelessly via Wi‑Fi to the free Focustronic AIO app on iOS or Android. Monitor live results, review historical graphs and make informed adjustments from anywhere.
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Automated schedules: Set custom test intervals for each parameter; the system runs tests and can trigger dosing or lighting adjustments when paired with compatible devices.
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Exclusive OLI monitoring: Only the Mastertronic series measures the Organic Level Index – an indicator of organic buildup that tells you when a water change or fresh carbon is needed.
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Smart integration: Seamlessly integrates with Dosetronic, Powertronic and Solartronic for automatic dosing, power control and lighting adjustments.
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Safety & reliability: A leak‑detector and built‑in waste management help prevent spills, while the unit’s robust construction has earned praise from reef keepers around the world.
App‑controlled convenience
Stay connected to your reef with the Focustronic AIO app. The intuitive dashboard displays the latest test results from your Mastertronic and other Focustronic devices. You can schedule tests, view parameter trends and adjust dosing settings in a few taps. The app even supports voice commands at launch for hands‑free operation.
Precision engineering inside
Peek under the hood and you’ll find a proprietary pipette with 12 independent nozzles, a rotating vial carousel and high‑precision pumps that handle sample collection and reagent dosing with care. This thoughtful design ensures consistent measurements and minimizes maintenance.
Key specifications
| Parameter | Accuracy / Precision | Typical test time |
|---|---|---|
| Nitrate (NO₃) | ±0.5 ppm | ~30 min |
| Phosphate (PO₄) | ±0.01 ppm | ~20 min |
| Alkalinity (dKH) | ±0.1 dKH | ~8 min |
| Calcium (Ca) | ±6 ppm | ~12 min |
| Magnesium (Mg) | ±20 ppm | ~12 min |
Other essentials: Dimensions 31.5 × 22.5 × 35.0 cm (approx. 12.4 × 8.9 × 13.8 in), Wi‑Fi connectivity, and stand‑alone operation—no central controller required.
Compatible test kits
To ensure the highest accuracy, the Mastertronic Essential works with popular 3rd‑party test kits (reagents sold separately):
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Nitrate (NO₃): API Nitrate Test Kit
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Phosphate (PO₄): Red Sea Phosphate Pro Kit
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Calcium: API Calcium Test Kit
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Magnesium: Red Sea Magnesium Pro Kit
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Alkalinity: Red Sea Alkalinity Pro Kit
What’s include
Each preorder includes one Mastertronic Essential unit. Reagents are sold separately so you can choose your preferred test kits.
