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A small dark packet labeled COND53 with a wave graphic, this Neptune Conductivity Calibration Solution guarantees accuracy with its precise 53 mS standard for salinity calibration.
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NEPTUNE CONDUCTIVITY CALIBRATION SOLUTION 53 mS COND53

Original price was: $2.99.Current price is: $1.99.
Box of HANNA COPPER HIGH RANGE REAGENTS 25 CT, specially made for the HI702 Checker HC, includes 25 tests for precise copper analysis.
Packaging for HANNA COPPER HIGH RANGE REAGENTS 25 CT features a QR code, lot number H027, and an expiration date of 02/2026, intended solely for lab and industrial use.
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HANNA COPPER HIGH RANGE REAGENTS 25 CT

$17.99
A white and orange Hanna Instruments box contains 25 HANNA TDS CALIBRATION SOLUTION 20 mL packets, each with precisely measured solution for accurate calibration.
The 20 ml HANNA TDS Calibration Solution packet includes a temperature (°C) to ppm correlations table, features the Hanna Instruments logo at the bottom, and provides manufacturing details along with website information.
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HANNA TDS CALIBRATION SOLUTION 20 ML

$2.49
The HANNA SALINITY TESTER features a sleek design with a digital display showing 10.25 ppt, waterproof build, dual graphite electrodes, automatic temperature compensation, easy calibration, and auto shut-off for seamless marine measurements.
The HANNA SALINITY TESTER package features the code HI98319, a serial number, and a blue and white label with specifications. Made in Romania, it includes a website link and boasts a waterproof design for accurate measurements.
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HANNA SALINITY TESTER

$89.99
A white box labeled HANNA AMMONIA LOW RANGE REAGENTS (HI700-25) contains ammonia reagents, depicted with two blue-iconed bottles. It includes a QR code and detailed product information, suitable for laboratory and industrial use.
A white box labeled as part of HANNA AMMONIA LOW RANGE REAGENTS displays hazard symbols for flammability, toxicity, and environmental danger. It details the HI7000B-0 Ammonia LR Reagent B and is shrink-wrapped.
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HANNA AMMONIA LOW RANGE REAGENTS

$18.99
The SEACHEM AMMONIA ALERT provides easy, continuous monitoring for freshwater and marine tanks. Its circular indicator specifies safe, alert, alarm, and toxic levels for stress-free tank maintenance.
The image shows the reverse side of a SEACHEM AMMONIA ALERT package with multilingual text for directions, warnings, and installation instructions. The packaging includes a barcode at the bottom, a white background, and a hook cutout at the top.
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SEACHEM AMMONIA ALERT

$9.99
The API FRESHWATER MASTER TEST KIT includes a clear plastic container with a blue lid and offers 800+ tests for pH, high range pH, ammonia, nitrite, and nitrate. It contains test bottles, detailed instructions, and a color chart.
The API FRESHWATER MASTER TEST KIT, housed in a plastic container with a blue lid, offers warnings and manufacturer details on the front for easy monitoring of your aquatic environment and ensuring optimal fishkeeping water quality.
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API FRESHWATER MASTER TEST KIT

$41.99
The MILWAUKEE PH CONTROLLER PRO MC122 is presented in a black box with white and green accents. The colorful image shows an LED display at 5.88 with control knobs, featuring Milwaukee logos and website info for easy access.
The sleek black packaging for the Milwaukee PRO Digital Controllers prominently highlights the features and name of models like the Milwaukee pH Controller PRO MC122, using a sophisticated gray and green color scheme.
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MILWAUKEE PH CONTROLLER PRO MC122

$149.99
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A coiled black NEPTUNE 1 LINK MALE MALE EXTENSION CABLE 10 FT (CBL-1LINK-MM-10) with male-male connectors and multiple pins is laid on a plain white surface, neatly arranged with some text imprinted along its length.
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NEPTUNE 1 LINK MALE MALE EXTENSION CABLE 10 FT CBL-1LINK-MM-10

Original price was: $21.99.Current price is: $13.19.
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In an open black carrying case, find the Hanna Freshwater Alkalinity Checker, a blue digital meter for testing alkalinity, vials, and an HI775-26 labeled bottle; instructions are in the lid.
The package, in white and blue, displays HANNA instruments text and lab equipment icons. At the bottom are website details and symbols for recycling, CE, and waste disposal—ideal for Hanna Freshwater Alkalinity Checker users.
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HANNA FRESHWATER ALKALINITY CHECKER

$67.99
Explore the HANNA PHOSPHATE ULTRA LOW RANGE REAGENTS, a box of 25 tests perfect for the HI774 Checker HC. The packagings abstract purple and blue design enhances its visual appeal.
Box of 25 HANNA PHOSPHATE ULTRA LOW RANGE REAGENTS, with each piece weighing 0.18g. The label includes a marine line logo, QR code, and recycling symbols. Lot H029 expires in 09/2023.
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HANNA PHOSPHATE ULTRA LOW RANGE REAGENTS

$17.99
The HANNA MARINE CALCIUM REAGENTS, designed for the HI758 Checker HC, come in white packaging with blue and red accents. These premium reagents allow for about 25 tests, providing precise marine water analysis.
HANNA MARINE CALCIUM REAGENTS box contains a 30 mL bottle labeled HI7581 and 25 sachets labeled HI7582. Ideal for precise marine calcium testing.
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HANNA MARINE CALCIUM REAGENTS

$29.99
The SEACHEM PH ALERT packaging elegantly displays the pH scale from 5.4 to 8.0, featuring clear readings, detailed instructions, and distinctive branding for effortless freshwater pH monitoring at a glance.
The back of the SEACHEM PH ALERT package shows instructions in multiple languages like English, Spanish, and French. A barcode is at the bottom, and the packaging is mainly white with black text.
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SEACHEM PH ALERT

$9.99
The TETRA EASY STRIPS 6 IN 1 TEST 25 PK packaging features vibrant fish images and highlights its ability to test pH and nitrate levels, making it suitable for freshwater and saltwater aquariums.
Explore the TETRA EASY STRIPS 6 IN 1 TEST 25 PK, complete with a detailed chart to test nitrate, nitrite, hardness, chlorine, alkalinity, and pH. Get clear instructions, insights on water quality solutions, and safety warnings for optimal aquarium care.
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TETRA EASY STRIPS 6 IN 1 TEST 25 PK

$15.99
Box of the HANNA MARINE CALCIUM CHECKER for measuring ppm by Hanna Instruments, in white packaging with device images showing 430 ppm, aquarium reef graphics, key features, and the Marine Line logo.
The image shows the packaging for a HANNA MARINE CALCIUM CHECKER. The box details specifications, contents, and contact info, with certification symbols at the bottom.
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HANNA MARINE CALCIUM CHECKER

$67.99
The HANNA MARINE ALKALINITY CHECKER dKH, priced at $49.99, comes in packaging featuring the handheld device displaying 10.0, highlighting its use for seawater alkalinity measurement in aquariums and marine biology.
The HANNA MARINE ALKALINITY CHECKER dKH packaging is designed for measuring seawater alkalinity, showcasing its purpose, specifications, usage details, and featuring a QR code and recycling symbols.
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HANNA MARINE ALKALINITY CHECKER dKH

$67.99
The HANNA COPPER HIGH RANGE CHECKER packaging features the HI702 Handheld Colorimeter. It includes a digital display showing 1.50 ppm, product details, and a price of $49.99, ideal for easy and accurate copper level measurement.
The HANNA COPPER HIGH RANGE CHECKER, a handheld colorimeter for high-range copper levels, comes in a white box. The front shows specifications and uses. Inside are reagents, instructions, and standard solutions for testing.
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HANNA COPPER HIGH RANGE CHECKER

$67.99
A BRS LED Refractometer setup includes a blue plastic Portable Refractometer and a white bottle of Bulk Reef Supply Refracto Juice with coral imagery, all on a white surface.
An open blue plastic case on a white background reveals a sealed BRS LED Refractometer with Calibration Fluid, wrapped in plastic, alongside two small round accessories nestled in the lid.
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BRS LED REFRACTOMETER WITH CALIBRATION FLUID

$39.99
The image shows a HANNA TDS TESTER by Hanna Instruments in blue, displaying 250 on the screen. The packaging includes model number HI98301 with a price tag of $52.99.
The HANNA TDS TESTER is packaged in a sealed box with clear product information. It is labeled Made in Romania and includes a website URL for more details.
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HANNA TDS TESTER

$79.99
The API PHOSPHATE TEST KIT for aquariums provides 150 tests to maintain healthy water quality in fresh and saltwater environments. The box, featuring a test tube and fish, highlights its effectiveness in preventing algae growth.
The back of the blue and white API PHOSPHATE TEST KIT box includes English and French instructions to test aquarium phosphate levels, safety warning symbols at the bottom, and a prominently displayed expiration date at the top.
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API PHOSPHATE TEST KIT

$16.99
The API NITRITE TEST KIT helps prevent fish loss from high nitrite levels with tools for 180 tests, suitable for fresh and saltwater aquariums, featuring a fish illustration on the box.
The API NITRITE TEST KITs blue and white packaging displays product details in English and French. Highlighted with Fast • Easy • Accurate, it measures nitrite levels from 0 to 5 ppm (mg/L). The expiry date is clearly marked as 09-2024.
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API NITRITE TEST KIT

$12.99
The API NITRATE TEST KIT is essential for aquariums, offering 90 tests to reduce nitrate levels and maintain a healthy environment in fresh and saltwater tanks. The box features an image of the components and fish.
The API NITRATE TEST KIT packages back view has instructions in English and Spanish for measuring 0–160 ppm nitrate levels, with prominent blue and gray sections, lot number, expiration date, and warning symbols at the bottom.
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API NITRATE TEST KIT

$15.99
The API KH TEST KIT measures carbonate hardness in aquarium water, promoting a healthy environment for tropical fish. The blue and white packaging displays images of colorful fish and includes benefits in English and French.
The API KH TEST KIT box, in blue and white, highlights its user-friendly design and pH-stabilizing accuracy with descriptions in English and French. Lot and expiration dates are included for convenience.
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API KH TEST KIT

$9.99
The API GH/KH Test Kit features blue and white packaging with illustrations of plants, fish, and a test vial. Its designed for freshwater aquariums to promote a natural habitat, ensuring optimal conditions for aquatic life.
Box of the API GH/KH TEST KIT for freshwater fish and plants; includes English and French instructions to measure General Hardness (GH) and Carbonate Hardness (KH). Safety hazard symbols are clearly displayed at the bottom.
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API GH/KH TEST KIT

$13.99
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