Hanna Instruments Phosphorus ULR Reagent Refill (HI736-25)

Hanna Phosphorus ULR Reagents (HI736-25)

The Hanna Phosphorus Ultra Low Range Reagents (HI736-25) are replacement reagents designed for use with the Hanna HI736 Phosphorus ULR Checker. Manufactured to Hanna’s high-quality standards, these pre-measured reagents provide accurate, reliable phosphorus testing and are ideal for maintaining consistent water quality in reef aquariums.

Features:

• Designed exclusively for the Hanna HI736 Phosphorus ULR Checker
• Includes enough reagent for 25 tests
• Pre-measured packets for quick and easy testing
• Provides consistent, accurate phosphorus measurements
• Helps monitor ultra-low nutrient levels to support healthy coral growth and reduce nuisance algae
• Long shelf life when stored in a cool, dry place

Note: These reagents measure phosphorus (ppb P), not phosphate (ppm PO₄). If needed, phosphorus readings can be converted to phosphate by multiplying the result by 0.003066.

All livestock ships via FedEx Priority Overnight, double-bagged and temperature-protected with a heat or ice pack as needed for your destination.

Florida orders under $299 ship for $25; out-of-state orders under $299 ship for $40. Orders over $299 ship free. We don't currently ship to Alaska, Hawaii, Puerto Rico, or outside the continental U.S.

Free in-store pickup is always available — contact us for details.

If your coral arrives dead on arrival (DOA), report it within 2 hours of the delivery time shown on your FedEx tracking — email a clear photo to info@strictlyfishmiami.com and we'll issue a store credit for the purchase price of the livestock.

See our full Refund Policy for details.