it says expiration date 5/2021 , are they still usable?

Probably, they are dry reagents. I would suggest ordering a new batch, comparing tests, and then decide.

So just to confirm hi774 is the same as hi736?

Hello hi774 is NOT the same as hi736. HI774-25 is designed to be used with samples that have an expected range of 0.00 to 0.90 ppm phosphate. HI736-25 is designed to be used with samples that have an expected range of 0 to 200 ppb phosphorus.

Hanna Hi 774 25 Phosphate Ultra Low Range Checker Reagents

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€ 53.02

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Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🧬 Unlock pristine water clarity with precision you can count on!

MADE IN THE USA - Crafted with high-purity chemicals by a trusted industry leader, Hanna Instruments
EFFORTLESS ACCURACY - Pre-measured reagents ensure fast, reliable phosphate readings every time
ULTRA LOW SENSITIVITY - Detects phosphate levels as low as 0.00 ppm, perfect for pristine water environments
VERSATILE APPLICATION - Ideal for aquariums, aquaculture, environmental monitoring, and water quality testing
TRACEABILITY YOU CAN TRUST - Each packet marked with expiration date and lot number for full quality control

The HANNA HI 774-25 reagent packets provide 25 pre-measured ultra low range phosphate tests designed for rapid, accurate phosphate detection from 0.00 to 0.90 ppm. Manufactured in the USA with high-purity chemicals, each reagent is traceable via expiration and lot numbers, making it ideal for professional aquarium, aquaculture, and environmental water quality monitoring.

Specifications

ASIN	B07SN7NSHP
Best Sellers Rank	#22,908 in Pet Supplies ( See Top 100 in Pet Supplies ) #1,346 in Aquarium Accessories
Brand	Hanna Instruments
Brand Name	Hanna Instruments
Country of Origin	USA
Customer Reviews	4.8 out of 5 stars 413 Reviews
Global Trade Identification Number	00860012631049
Manufacturer	Hanna Instruments
Model Number	HI774-25
Part Number	HI774-25

Reviews

M**O

Love it

Best tester ever ! reagent is on point most of the time it’s off ,there dirt on the glass

20.07.2026

C**S

Phos testing powder

Works good as described

14.07.2026

D**I

Buying was quicker than the online stores

Good dates. Came well packaged.

3.08.2026

D**G

Test every few days.

I got all of the Hanna testers. No need to try to determine colors.

1.04.2026

B**6

Correct Replacements

Exactly replacement for the packets that come with the Hanna testers.

25.09.2025

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€ 53.02

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Greece.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago