Reliable Phosphate Testing Starts with Genuine Hanna Reagents

Keep your Hanna HI774 Marine Ultra Low Range Phosphate Checker HC delivering accurate, dependable results with genuine HI774-25 Replacement Reagents. Designed specifically for the HI774 Checker, these pre-measured reagents make it quick and easy to monitor phosphate levels in reef and marine aquariums.

Each package includes enough reagent to perform 25 phosphate tests, allowing you to routinely monitor one of the most important nutrients affecting coral health and nuisance algae growth. Consistent phosphate testing helps reef keepers maintain stable water chemistry and create an environment where corals can thrive.

Manufactured using high-purity chemicals, every reagent packet is lot numbered and expiration dated to ensure quality, consistency, and traceability.

Key Features

• Genuine Hanna Instruments replacement reagents
• Performs 25 Ultra Low Range phosphate tests
• Designed specifically for the HI774 Marine Phosphate Checker HC
• Pre-measured packets for quick, convenient testing
• High-purity chemicals for reliable results
• Lot numbered and expiration dated for quality assurance
• Ideal for reef aquariums and marine systems

Compatibility

Compatible with:

• Hanna HI774 Marine Ultra Low Range Phosphate Checker HC

These reagents are designed exclusively for use with the HI774 Checker.

Specifications

• Part Number: HI774-25
• Quantity: 25 Tests
• Parameter: Marine Phosphate (Ultra Low Range)
• Testing Range: 0.00–0.90 ppm Phosphate (PO₄³⁻)
• Method: Ascorbic Acid Method
• For Saltwater Aquariums

What's Included

• Hanna HI774-25 Ultra Low Range Phosphate Reagents
• 25 Individual Test Packets

Why You'll Love It

Maintaining ultra-low phosphate levels is essential for healthy coral growth, vibrant coloration, and minimizing nuisance algae. Genuine Hanna reagents ensure your HI774 Checker continues providing fast, accurate digital measurements you can trust for every test.

Why Buy from Infinity and Beyond Aquatics?

At Infinity and Beyond Aquatics, we stock genuine Hanna Instruments products trusted by reef hobbyists around the world. Whether you're maintaining a mixed reef or an SPS-dominated aquarium, we're committed to providing premium equipment and dependable customer service.

Shipping Information

Shipping Available Nationwide

This item ships within 1–3 business days, and tracking information will be emailed as soon as your order ships.

• FREE Standard Shipping on qualifying orders over $100 (U.S. only)
• Orders below the free shipping threshold are calculated at checkout based on your selected shipping method.
• This item is carefully packaged to help ensure it arrives in excellent condition.