HI758 Marine Calcium Checker® HC

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Description

Product information "HI758 Marine Calcium Checker® HC"

Always get accurate results for your saltwater aquarium with our handheld colorimeter.

Our saltwater calcium colorimeter fills the gap between calcium test kits and advanced instrumentation. Standard test kits have limited accuracy as they depend on the human eye to determine colors. Our handheld colorimeter eliminates the trouble of matching to a color chart by providing a direct saltwater calcium result in ppm CaCO3.

Our portable handheld colorimeter goes where you go.
Achieve your calcium results easily with simple, one-button design.
Quickly get your results without any hassle.

Details

The HI758U Checker® HC (Handheld Colorimeter) provides a simple, accurate and cost-effective way to measure calcium. Required for the development of calcium carbonate skeletons of coral reefs, calcium is a crucial component of marine waters. Designed as a more accurate alternative to chemical test kits, the HI758U provides quick, accurate results in a few easy steps.

Features at-a-glance:

Easier to use and more accurate than chemical test kits
Dedicated to a single parameter
Small size, big convenience
Ideal for: Aquaculture, Water Quality, Environmental, Education

The HI758U Marine Calcium Checker HC® uses a 100 to 1 dilution for analysis and thus requires deionized or distilled water absent of calcium to function correctly. Calcium can be found in many freshwater sources and this any amount present in the water used at the C1 phase can cause false high readings. In addition, many hobby grade reverse osmosis deionized water systems may not adequately remove calcium. This can vary based on the types of filters used, their effectiveness and frequency of replacement. We recommend using deionized water with low conductivity or pure vapor distilled water commonly found in most pharmacies.

Never use tap water to clean your cuvettes. This is especially important for the HI758U Marine Calcium Checker as calcium is commonly present in tap water and residual amounts present in the cuvette will elevate results produced by the Checker. Our HI98703-50 Cuvette Cleaning Solution ensures the glass cuvette used for colorimetric measurements remains clean and free from imperfections.

Calcium Checker Troubleshooting Tips

Never rinse your cuvettes with tap water or saltwater
Use pure vapor distilled water from your local pharmacy at C1 phase. RODI water from home filtration units may not be suitable for this test as calcium can easily permeate through your filter membranes.
Clean your cuvettes with distilled or deionized water absent of Calcium that is going to be used for C1 phase dilution.
Measure out 9 ml of distilled or deionized water for C1 phase
Make sure no excess aquarium sample saltwater is on the tip of the pipette. Only administer the saltwater that is sucked into the pipette tip.

Specifications

Range	200 to 600 ppm
Resolution	1 ppm
Accuracy @ 25°C/77°F	±6% of reading
Light Source	LED @ 610 nm
Light Detector	silicon photocell
Method	adaptation of the Zincon method
Environment	0 to 50°C (32 to 122°F); RH max 95% non-condensing
Battery Type	(1) 1.5V AAA
Auto-off	after ten minutes of non-use
Dimensions	81.5mm x 61mm x 37.5mm (3.2" x 2.4" x 1.5”)
Weight	64 g (2.25 oz.)
Ordering Information	HI758 Calcium Checker is supplied with (2) sample cuvettes with caps, calcium reagent starter kit for 25 tests, dropper,1 ml syringe with tip, 100 microliter pipette with tip, plastic pipette, battery, instructions and quick start guide.
Warranty	1 year limited warranty

HI758 Marine Calcium Checker® HC

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- Deel
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Product information "HI758 Marine Calcium Checker® HC" Always get accurate results for your saltwater aquarium with our handheld colorimeter. Our... Read more

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Description

Product information "HI758 Marine Calcium Checker® HC"

Always get accurate results for your saltwater aquarium with our handheld colorimeter.

Our saltwater calcium colorimeter fills the gap between calcium test kits and advanced instrumentation. Standard test kits have limited accuracy as they depend on the human eye to determine colors. Our handheld colorimeter eliminates the trouble of matching to a color chart by providing a direct saltwater calcium result in ppm CaCO3.

Our portable handheld colorimeter goes where you go.
Achieve your calcium results easily with simple, one-button design.
Quickly get your results without any hassle.

Details

The HI758U Checker® HC (Handheld Colorimeter) provides a simple, accurate and cost-effective way to measure calcium. Required for the development of calcium carbonate skeletons of coral reefs, calcium is a crucial component of marine waters. Designed as a more accurate alternative to chemical test kits, the HI758U provides quick, accurate results in a few easy steps.

Features at-a-glance:

Easier to use and more accurate than chemical test kits
Dedicated to a single parameter
Small size, big convenience
Ideal for: Aquaculture, Water Quality, Environmental, Education

The HI758U Marine Calcium Checker HC® uses a 100 to 1 dilution for analysis and thus requires deionized or distilled water absent of calcium to function correctly. Calcium can be found in many freshwater sources and this any amount present in the water used at the C1 phase can cause false high readings. In addition, many hobby grade reverse osmosis deionized water systems may not adequately remove calcium. This can vary based on the types of filters used, their effectiveness and frequency of replacement. We recommend using deionized water with low conductivity or pure vapor distilled water commonly found in most pharmacies.

Never use tap water to clean your cuvettes. This is especially important for the HI758U Marine Calcium Checker as calcium is commonly present in tap water and residual amounts present in the cuvette will elevate results produced by the Checker. Our HI98703-50 Cuvette Cleaning Solution ensures the glass cuvette used for colorimetric measurements remains clean and free from imperfections.

Calcium Checker Troubleshooting Tips

Never rinse your cuvettes with tap water or saltwater
Use pure vapor distilled water from your local pharmacy at C1 phase. RODI water from home filtration units may not be suitable for this test as calcium can easily permeate through your filter membranes.
Clean your cuvettes with distilled or deionized water absent of Calcium that is going to be used for C1 phase dilution.
Measure out 9 ml of distilled or deionized water for C1 phase
Make sure no excess aquarium sample saltwater is on the tip of the pipette. Only administer the saltwater that is sucked into the pipette tip.

Specifications

Range	200 to 600 ppm
Resolution	1 ppm
Accuracy @ 25°C/77°F	±6% of reading
Light Source	LED @ 610 nm
Light Detector	silicon photocell
Method	adaptation of the Zincon method
Environment	0 to 50°C (32 to 122°F); RH max 95% non-condensing
Battery Type	(1) 1.5V AAA
Auto-off	after ten minutes of non-use
Dimensions	81.5mm x 61mm x 37.5mm (3.2" x 2.4" x 1.5”)
Weight	64 g (2.25 oz.)
Ordering Information	HI758 Calcium Checker is supplied with (2) sample cuvettes with caps, calcium reagent starter kit for 25 tests, dropper,1 ml syringe with tip, 100 microliter pipette with tip, plastic pipette, battery, instructions and quick start guide.
Warranty	1 year limited warranty

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Product, Delivery & Returns (FAQs)

How much does standard home delivery cost, and how long does it take?

We offer reliable door-to-door home delivery across South Africa via our dedicated courier networks:

Gauteng Local Delivery: R89.00 (Standard fee for orders under R1,500.00). Delivered within 1 - 2 business days.
National Delivery (Rest of SA): R129.00 (Standard fee for orders under R1,500.00). Delivered within 3 - 5 business days.

How do I qualify for FREE Home Delivery?

Any standard order (excluding large aquariums and cabinets) that has a cart total of R1,500.00 or more automatically qualifies for FREE Door-to-Door Home Delivery, regardless of whether you live locally in Gauteng or anywhere else nationwide.

What is Locker & Counter Pickup, and how much does it cost?

Locker and Counter pickup is our budget-friendly shipping alternative powered by the Pargo, Bob Box, and Pudo networks. Instead of waiting at home for a courier, your parcel is delivered to a secure local retail point (like a Clicks store) or a smart locker bank for you to collect whenever it suits you.

Flat Rate Nationwide: R59.00 for orders under R1,000.00.
FREE Locker Delivery: Automatically unlocked for orders of R1,000.00 or more.

How do I select my preferred locker or pickup location?

Because we keep our checkout fast and fully integrated on Shopify, you simply need to state your destination manually before paying.

Note: If you forget, don't worry - we will contact you after your payment is complete to confirm your exact locker location.

Here is how to select your locker:

Add your items to your shopping cart.
Open your Cart Page or Cart Drawer before clicking checkout.
Locate the text box labeled: “If selecting Locker Delivery, please type your closest Pudo or Pargo location here:.”
Type your preferred collection spot (e.g., Pargo Clicks Sandton City or Pudo Locker Total Energies Bryanston).
Proceed to checkout and choose the 📦 Pargo / Bob Box Locker Delivery rate.

What is your return policy if I change my mind?

We want you to be 100% satisfied with your setup. We offer a hassle-free 7-day return policy on all unopened and unused dry goods and hardware. (Note: For the safety of our animals, livestock purchases have separate terms. Please see our full refund policy for details).

Is checkout safe and what payment methods are accepted?

Absolutely. Our checkout is 100% secure and encrypted. We partner with trusted South African gateways like Payfast to give you flexible options. You can pay via credit/debit card, Instant EFT, Apple Pay, Samsung Pay, or even buy now and pay later with Payflex.

Note: You'll find all the payment methods when you select Payfast payment option during checkout.

How do Payflex interest-free installments work?

Payflex allows you to get your order immediately while splitting the total cost into 4 equal installments over 6 weeks. Here is everything you need to know before checking out:

Zero Interest & No Fees: You only pay the exact item price. There is absolutely no interest and no hidden fees as long as your payments are made on time.
How to Checkout: Simply add your items to the cart, select "Payflex" as your payment method on the final checkout screen, and pay your first 25% installment today. We will ship your order right away!
Instant Approval: There are no long forms or credit checks. You just need your South African ID number and a Visa or Mastercard. Approval is completely automated and takes seconds.
Easy Refunds: If you ever need to return an item, our standard store return policy applies. Payflex will automatically cancel any future scheduled payments and refund the money you have already paid directly back into your bank account.

Can I trust the quality of your products and livestock?

Absolutely. Every item in our catalog of 4,200+ products is carefully selected based on our 20+ years of hands-on aquatic experience. We proudly stock over 50 of the world’s top premium brands, ensuring that whether you are buying high-end hardware, aquascaping materials, or healthy livestock, you are getting the absolute best for your underwater world. Since 2006, our dedicated aquarium experts have helped over 10,000 hobbyists succeed. Whether you need advice on compatibility, sizing, or water parameters, our expert team is just a message away.