Calcium Reagent - 25 Tests - Hanna Instruments
Calcium Reagent - 25 Tests - Hanna Instruments
Buy now, pay later
Split your purchase into smaller payments with the provider you prefer. Pick your plan at checkout.
Checking out with Shop Pay? The Shop Pay screen only offers Shop Pay Installments. To pay with PayPal, Klarna, or Affirm, select Check out as guest to see every payment option, or use the PayPal button in your cart.
Shop Pay Installments
- 4 interest-free payments every 2 weeks on orders from $50 to $999.99
- 2 interest-free payments on orders from $35 to $50
- Monthly plans on orders from $150
- Check out with Shop Pay, then choose an installment plan
Payment options are offered by Affirm and are subject to an eligibility check and might not be available in all states. Monthly plans may include interest (0–36% APR). CA residents: Loans by Affirm Loan Services, LLC are made or arranged pursuant to a California Finance Lender license.
Learn more about Shop Pay Installments
PayPal Pay Later
- Pay in 4: 4 interest-free payments every 2 weeks on purchases from $30 to $1,500
- Pay Monthly: 3 to 24 monthly payments on purchases from $49 to $10,000
- Select PayPal in your cart or at checkout, then choose Pay Later
Pay in 4 is available to consumers upon approval and is not currently available to residents of MO. Pay Monthly is subject to consumer credit approval, with a fixed APR of 9.99–35.99%. The lender for Pay in 4 is PayPal, Inc. (NMLS #910457). The lender for Pay Monthly is WebBank.
Learn more about PayPal Pay Later
Klarna
- Pay in 4: 4 interest-free payments every 2 weeks on orders of $35 or more
- No interest or fees when you pay on time
- Choose Klarna as your payment method at checkout
Klarna Pay in 4 is subject to approval and isn't available in Hawaii, U.S. territories (excluding Puerto Rico), or for APO/FPO/DPO addresses. Late fees may apply.
Learn more about Klarna
Affirm
- Pay in 4: 4 interest-free payments every 2 weeks on eligible orders from $50
- Monthly plans with rates from 0–36% APR based on credit
- No late fees or hidden fees
- Choose Affirm as your payment method at checkout
Payment options through Affirm are provided by these lending partners: affirm.com/lenders. Your rate will be 0–36% APR based on credit and is subject to an eligibility check. Affirm Pay in 4 is 0% APR. Options depend on your purchase amount and may vary by merchant. A down payment may be required. CA residents: Loans by Affirm Loan Services, LLC are made or arranged pursuant to a California Financing Law license.
Learn more about AffirmGoes well with:
The HI758U-26 reagents are the designated replacement consumables for the Hanna Instruments HI758 Marine Calcium Checker HC. Manufactured in Hanna's own production facility using high-purity chemicals, these reagents are pre-measured into individual packets so there is no need to weigh or dilute anything before a test. Each packet is marked with a lot number and expiration date, giving hobbyists and professionals alike a clear record of reagent age and batch traceability.
The chemistry behind these reagents is the Zincon Method. Adding 1 mL of the first reagent to the water sample, followed by the contents of the second reagent packet, initiates a colorimetric reaction that turns the sample blue. The HI758 Checker then reads the intensity of that color and converts it to a calcium concentration displayed in parts per million. The process is straightforward and produces results quickly, without requiring a separate spectrophotometer or manual color-matching.
These reagents are validated for samples containing between 200 and 600 ppm calcium, a range that covers typical reef aquarium parameters. For consistent accuracy, reagents should be stored according to Hanna's guidelines and used before the printed expiration date. Each kit contains enough material for 25 individual tests.
Overview
Accurate. Traceable. Ready.
Replacement reagents designed specifically for the HI758 Marine Calcium Checker HC, covering 25 tests per kit using validated Zincon Method chemistry.
Pre-Measured Reagents
- Individual packets eliminate manual measuring and weighing
- Consistent reagent volumes support repeatable test results
- Ready to use directly with the HI758 Checker workflow
Traceable Quality
- Each packet printed with lot number and expiration date
- Manufactured with high-purity chemicals in Hanna's own facility
- Traceability supports record-keeping for professional and advanced hobbyist use
Zincon Method Chemistry
- Colorimetric reaction produces a blue tint proportional to calcium concentration
- Results displayed in ppm by the HI758 Checker
- Validated range of 200–600 ppm covers standard reef aquarium parameters
Specifications
HI758U-26 CALCIUM REAGENTS
- Compatible Instrument
- HI758 Marine Calcium Checker HC
- Number of Tests
- 25
- Method
- Zincon Method (colorimetric)
- Measurement Range
- 200–600 ppm calcium
- Result Units
- ppm (mg/L) Ca²⁺
- Reagent Format
- Pre-measured liquid and powder packets
- Traceability
- Lot number and expiration date printed on each packet