Keep your marine or reef aquarium pristine with this complete testing and reagent kit from Hanna Instruments. Designed for accuracy and ease, it combines ultra‑low‑range phosphate and high‑range nitrate handheld photometers with enough reagents to keep you measuring for months.
774 Checker
The HI774 Ultra Low Range Phosphate Checker HC (Handheld Colorimeter) provides a simple, accurate and cost-effective way to measure phosphate in marine systems including reef tanks. Phosphate is an important parameter to measure in aquaculture and aquariums; levels that are too high can lead to extensive algae growth, depleted dissolved oxygen levels, and ultimately can be fatal to many types of fish and aquatic life. Designed as a more accurate alternative to chemical test kits, the HI774 provides quick, accurate results in a few easy steps.
782 Checker
The HI782 Marine Nitrate High Range Colorimeter is specifically designed to quickly and accurately determine high levels of nitrate for saltwater aquariums and marine applications. With a digital read out, there is no more struggling to determine colors visually.
What’s Included
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HI‑774 ULR Phosphate Checker HC
A pocket-sized colorimeter delivering precise phosphate readings from 0.00–0.90 ppm with 0.01 ppm resolution—no more squinting at color pads.
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HI‑782 High‑Range Nitrate Checker HC
Capable of measuring elevated nitrate levels typical in reef systems; ideal for monitoring nutrient spikes and algae blooms.
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Reagent Packs
Enough HI‑774‑25 and HI‑782‑25 reagents (25 tests each) to sustain routine testing.
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Accessories
Includes cuvettes, caps, AAA batteries, and instruction guides—everything you need to start right away.
Why You’ll Love It
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Digital Accuracy: Handheld colorimeters eliminate subjective visual matching for reliable results every time.
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Ultra‑Low Sensitivity: Phosphate checker easily detects levels as low as 0.01 ppm—crucial, as even slight phosphate increases (≥0.05 ppm) can hinder coral calcification and spur algae growth..
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One‑Button Simplicity: Compact units powered by AAAs, with buzzer/timer cues and auto‑off features—great for field or in‑tank use.
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Cost‑Effective Maintenance: Once you own the checkers, just restock reagents—cuts down on waste and long‑term expenses.
Ideal For
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Reef keepers who demand precise phosphate control
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Hobbyists combating nuisance algae
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Marine aquarists doing monthly nutrient audits
Your Perfect Test Routine
Test phosphate weekly to stay under 0.05 ppm—above that invites algae blooms or stunted coral growth. Pair this with nitrate testing during water changes or after dosing.
Ready for Peak Aquarium Health?
This all‑in‑one kit empowers you to take control—with digital precision and lab‑grade sensitivity. Whether you're stepping up from traditional test strips or color-match kits, this is the next-level monitoring solution.
