- Sku: HI717
- Vendor: Hanna
Hanna Instruments 717 / HI717 | High Range Phosphate Colorimeter – Checker® HC | Freshwater, Saltwater & Aquaculture
Take the guesswork out of phosphate testing with the Hanna Instruments HI717 High Range Phosphate Checker® HC. Perfect for freshwater, saltwater, and aquaculture systems, this digital colorimeter provides precise readings without the need to interpret color charts. Ideal for planted tanks, nutrient-rich aquascapes, and phosphate-sensitive reef systems, it gives fast, accurate results every time.
- Measures phosphate levels from 0.0 to 30.0 ppm (mg/L)
- Accurate to ±1.0 ppm ±5% of reading
- Bright digital display eliminates human error
- Compact, handheld design – perfect for aquarium cabinets or travel
- Simple one-button operation for consistent results
- Includes starter reagents for 20 tests, sample cuvettes, and battery
- Optional HI717-25 reagent refills available for continued use
Why It Matters
High phosphate levels can lead to nuisance algae and poor coral or plant growth. The HI717 makes phosphate testing easy and reliable, whether you’re managing nutrient dosing in a planted freshwater system or controlling phosphate in a reef sump. It’s a great complement to other Hanna Checkers and test kits for maintaining balanced water parameters.
Water Type Compatibility
- ✅ Freshwater Aquariums
- ✅ Saltwater & Reef Aquariums
- ✅ Brackish Tanks
- ✅ Aquaculture & Fish Hatcheries
More Information
| Brand | Hanna Instruments |
| Product Type | Digital Colorimeter |
| Application | Freshwater, Saltwater, Brackish, Aquaculture |
| Range | 0.0 to 30.0 ppm (mg/L) |
| Resolution | 0.1 ppm |
| Accuracy @ 25°C | ±1.0 ppm ±5% of reading |
| Light Source | LED @ 525 nm |
| Light Detector | Silicon photocell |
| Method | Amino Acid Method (adaptation of Standard Methods for Water and Wastewater, 18th edition) |
| Battery Type | 1 × 1.5V AAA |
| Auto Shut-Off | After 10 minutes of non-use |
| Operating Environment | 0 to 50°C (32 to 122°F), max RH 95% non-condensing |
| Dimensions | 86 × 61 × 37.5 mm (3.4 × 2.4 × 1.5 in.) |
| Weight | 64 g (2.3 oz) |
| Included Items | 2 sample cuvettes with caps, phosphate reagent starter kit (20 tests), battery, instructions |
| Reagent Refill | HI717-25 (40 tests) |
| Calibration Check | HI717-11 |
| Warranty | 1 Year |
| Item # | HI717 |
| Condition | New |
| MSRP | $74.99 |
| Availability | Ships same or next business day |
| Made In | Romania |
Best Paired With: Use alongside Hanna’s Ultra Low Range Phosphate Checker for reef tanks or aquarium maintenance tools to prevent algae buildup and maintain pristine water clarity.
FAQ
- Is this for freshwater or saltwater? Both — ideal for planted aquariums, reef tanks, or aquaculture systems.
- Does it include reagents? Yes, enough for 20 initial tests. Refill packs are sold separately.
- Can I use this for ultra-low phosphate levels? For reefs under 0.9 ppm, use the HI774 Marine ULR Phosphate Checker instead.
- Is it waterproof? The device is splash-resistant and designed for aquarium environments.
- Does it need calibration? No, just use fresh reagents and clean cuvettes for consistent readings.
Have a question?
Hanna Instruments 717 / HI717 | High Range Phosphate Colorimeter – Checker® HC | Freshwater, Saltwater & Aquaculture