--- product_id: 443196992 title: "Hanna Marine Magnesium Checker HC HI783 Saltwater Aquariums, Marine, Aquaculture Applications Magnesium Tester 64 grams" brand: "hanna instruments" price: "101577CFA" currency: XOF in_stock: true reviews_count: 13 url: https://www.desertcart.sn/products/443196992-hanna-marine-magnesium-checker-hc-hi783-saltwater-aquariums-marine-aquaculture store_origin: SN region: Senegal --- # Fast digital readout Color-coded syringes Compact 64g size Hanna Marine Magnesium Checker HC HI783 Saltwater Aquariums, Marine, Aquaculture Applications Magnesium Tester 64 grams **Brand:** hanna instruments **Price:** 101577CFA **Availability:** ✅ In Stock ## Summary > 🌊 Dive into precision—never miss a magnesium beat! ## Quick Answers - **What is this?** Hanna Marine Magnesium Checker HC HI783 Saltwater Aquariums, Marine, Aquaculture Applications Magnesium Tester 64 grams by hanna instruments - **How much does it cost?** 101577CFA with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/443196992-hanna-marine-magnesium-checker-hc-hi783-saltwater-aquariums-marine-aquaculture) ## Best For - hanna instruments enthusiasts ## Why This Product - Trusted hanna instruments brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted by Pros:** Ranked #49 in Aquarium Test Kits with 4.3 stars from 250+ reviews—join the community that demands precision. - • **Compact Powerhouse:** Lightweight 64g design fits perfectly in any toolkit or lab bench without clutter. - • **Effortless Precision:** Digital readout delivers quick, accurate magnesium levels with fewer steps than traditional tests. - • **Marine-Grade Accuracy:** Specifically engineered for saltwater aquariums and aquaculture, ensuring optimal coral and invertebrate health. - • **Color-Coded Simplicity:** Intuitive syringes eliminate guesswork, making marine magnesium testing straightforward and foolproof. ## Overview The Hanna Marine Magnesium Checker HC HI783 is a handheld, digital magnesium tester designed for saltwater aquariums and marine applications. Featuring color-coded syringes and a compact 64g form factor, it offers fast, accurate magnesium measurements with fewer steps than chemical kits. Trusted by professionals and hobbyists alike, it ensures optimal marine ecosystem health by providing reliable data critical for coral and invertebrate vitality. ## Description Our Marine Magnesium Checker HC (HI783) is designed to accurately and quickly determine the magnesium level in marine (saltwater) samples. The digital readout makes measurements effortless. Our Magnesium Checker HC (HI783) is the first marine magnesium test of its kind! This Checker provides an uncomplicated, accurate, and budget-friendly way to measure magnesium in saltwater/marine environments. Color-coded syringes and straightforward testing steps ensure quick and easy measurements every time! Magnesium is vital in saltwater environments as it allows calcium and carbonate to be bioavailable for corals and invertebrates. Designed as a more accurate alternative to chemical test kits, our Marine Magnesium Checker HC (HI783) provides quick, accurate results in a few easy steps. Magnesium Checker Tips & Tricks for Accurate Measurements Measure liquids accurately by syringe by drawing up the plunger until the bottom seal of the plunger is at the desired volume mark. Do NOT raise the liquid to the mark as this will give a false high volume. An air gap between the plunger and liquid is normal. Always use clean, dry cuvettes and syringes/tips. Rinse with deionized (RODI) water only; never rinse with tank water. Dry the cuvettes before use to prevent dilution. Ensure the sample does not contain any debris. Whenever the cuvette is placed into the checker, it must be dry outside and free of fingerprints, oil and dirt. Wipe the cuvette thoroughly with HI731318 microfiber cleaning cloth or a lint-free cloth prior to insertion. Shaking the cuvette can generate bubbles, causing higher readings. To obtain accurate measurements, remove such bubbles by swirling or by gently tapping the cuvette. Do not let the reacted sample stand too long after reagent has been added, as accuracy will be affected. Discard the sample immediately after the readng has been taken or the glass might become permanently stained. Keep the tips with their appropriate syringes during measurement. Review: Much better results than color chart tests - Works great and much easier than the color chart tests. The liquid reagent though is very sticky and challenging to clean up if you spill it. I started pouring it into a glass before using the syringe. Not easy to use packaging in that part. Review: Good Magnesium Checker - This one was a little more involved than the alk, PO4 and NO3 checkers but still easy enough to use and great to have a number instead of guessing on standard tests. Helps to gauge when to add more Mg to the system. ## Features - Fewer steps than other chemical tests - Color-coded syringes make the magnesium test simple and effortless - Dedicated to a single parameter - Small size, big convenience - Ideal for: Saltwater Aquariums, Marine, and Aquaculture Applications ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0B337ZK5N | | Best Sellers Rank | #102,813 in Pet Supplies ( See Top 100 in Pet Supplies ) #157 in Aquarium Test Kits | | Brand | Hanna Instruments | | Brand Name | Hanna Instruments | | Customer Reviews | 4.3 out of 5 stars 255 Reviews | | Item Form | handheld | | Item Weight | 0.59 kg | | Manufacturer | Hanna Marine Magnesium Checker® HC HI783 | | Number of Items | 1 | | Pet Type | Fish | | Target Species | Fish | | Unit Count | 1 Count | ## Product Details - **Brand:** Hanna Instruments - **Item Form:** handheld - **Item Weight:** 0.59 Kilograms - **Liquid Volume:** 5 Milliliters - **Unit Count:** 1.00 Count ## Images ![Hanna Marine Magnesium Checker HC HI783 Saltwater Aquariums, Marine, Aquaculture Applications Magnesium Tester 64 grams - Image 1](https://m.media-amazon.com/images/I/41fpKPdLfKL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Much better results than color chart tests *by C***S on May 1, 2026* Works great and much easier than the color chart tests. The liquid reagent though is very sticky and challenging to clean up if you spill it. I started pouring it into a glass before using the syringe. Not easy to use packaging in that part. ### ⭐⭐⭐⭐⭐ Good Magnesium Checker *by B***E on August 8, 2025* This one was a little more involved than the alk, PO4 and NO3 checkers but still easy enough to use and great to have a number instead of guessing on standard tests. Helps to gauge when to add more Mg to the system. ### ⭐⭐⭐⭐⭐ Test every other day. *by D***G on April 1, 2026* This is a easy test with Hanna just read the instructions. ## Frequently Bought Together - Hanna Instruments Hanna Marine Magnesium Checker HC HI783 Saltwater Aquariums, Marine, Aquaculture Applications Magnesium Tester 64 grams - Hanna Instruments High Range Nitrate Checker HI782 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sn/products/443196992-hanna-marine-magnesium-checker-hc-hi783-saltwater-aquariums-marine-aquaculture](https://www.desertcart.sn/products/443196992-hanna-marine-magnesium-checker-hc-hi783-saltwater-aquariums-marine-aquaculture) --- *Product available on Desertcart Senegal* *Store origin: SN* *Last updated: 2026-09-16*