Water Tests & Treatment

Hanna Checkers Alkalinity Calcium water testers

The Hanna Checkers Alkalinity Calcium water testers are compact test kits designed for monitoring the water quality in fish tanks and aquariums. Made by Hanna Instruments, these testers measure important parameters such as alkalinity (KH), levels. Easy to use and accurate, these test kits provide pet owners with the tools needed to maintain a healthy and balanced aquatic environment for their fish and other aquatic pets. Perfect for hobbyists looking to ensure the water in their aquarium is safe and suitable for their aquatic animals. will need new batterys

Milwaukee MW102 PRO+ 2-in-1 pH and Temperature Meter w/ Box Good Shape

Used good shape. Comes with what you see, including some unused PH packs inside. Tested and works. Fast shipping

Fresh Salt Water Fish Tank Aquarium Monitor Copper Test Kit (90 Tests Size)

Condition is New. I could’ve sworn I bought this a year or two ago and just didn’t use it. I do want to be fully transparent though, so consider it “Used” or just as a collectible. It may not work although I honestly don’t have reason to believe that it wouldn’t.

Hanna Instruments HI97711 Total and Free Chlorine Tester

Aquarium Water Conditioners Lot Of 3

The Aquarium Water Conditioners Lot Of 3 by Tétra is designed to treat all water types in aquariums with a tank capacity of 500 gallons. Each unit is in fluid ounce measurement and is specially formulated to improve the water quality and maintain a healthy environment for fish and other aquatic pets. This product provides a convenient solution for maintaining clean and safe water conditions in larger aquarium setups. All near full, if not new.

LaMotte 3587 WaterLink Spin Touch FF for Freshwater or Marine Fish

Simply fill one disk with aquarium water, insert it into the unit, tap “Start,” and receive your results in about two minutes.

Hanna HI97115 Marine Master Multiparameter Photometer + Case & Reagents – Tested

Also includes remaining reagents (see photos) Note: Reagents are included. HI7581U Calcium Reagent A (~1/3 bottle remaining, exp 09/2026). Overall in great condition. Original carrying case. HI774-0 Phosphate Ultra Low Range (~3 tests, exp 08/2026).

API Freshwater Master Test Kit For Aquariums Open Box - Expired 04/2026

(Room shelf box 3)

Hanna H1758 Handheld Colorimeter Marine Calcium Tester (ppm) Reagents expired

The Hanna H1758 Handheld Colorimeter Marine Calcium Tester is a portable device designed specifically for measuring the concentration of calcium in marine water. Manufactured by Hanna Instruments, this handheld colorimeter is easy to use and provides accurate results for ensuring the proper calcium levels in fish tanks and aquariums. The HI758 Checker HC model is designed for marine water testing, making it a reliable tool for maintaining the health and well-being of fish and other aquatic animals.

Alkalinity DKH Colorimeter HI772 Hanna Checker (PRE-OWNED)

May have multiple units available - inquire to check for availability! Hobby smarter with affordable, more sustainable options. Good for your tank & great for the planet. Upgrade your tank without draining your wallet.

Instant Ocean Hydrometer Marine Reef Salinity Free Shipping

Hanna HI782 High Range Nitrate Checker HC (Saltwater) - *No Box*

High range nitrate Hanna checker. No box or reagents

Hanna Instruments HI758 Checker HC Handheld Colorimeter Marine Calcium+DI Water

It is widely used by reef hobbyists to replace standard chemical titration kits, providing a more objective digital readout in ppm. Key Specifications of the HI758. The HI758 requires a 100 to 1 dilution to function, making it more sensitive to procedural errors than other checkers.

#570 Aquarium Exact iDip/Sensafe/Industrial Test Systems Digital Testing Kit

#570 Fresh Water Aquarium Test Kit. Bluetooth. Sensafe/Industrial Test Systems Digital #486107-AQ-K Made in the USA Includes 10 unopened test strip bottles Test strips: Ammonia - 1 Hardness - 2 PH - 3 Nitrates - 2 Nitrites - 2 Phosphate - 2 Alkalinity - 2 Chlorine - 2 Includes 2 brushes

Hannah low range Phosphate salt water test kit.

Hannah low range salt water test kit. Best salt water test kits on the market. Quick and easy.

Aquarium Chemicals Essentials Bundle.

Hanna Instruments Water Hardness Test Kit Fresh Or Saltwater HI3812

The Hanna Instruments Water Hardness Test Kit (HI3812) is a reliable and accurate tool for measuring water hardness levels in both fresh and saltwater environments. Made by the trusted brand Hanna, this test kit is designed to provide precise readings to help maintain optimal water conditions for fish and other aquatic pets. Whether you are testing the water hardness in your aquarium or pond, this kit is a must-have for ensuring a healthy environment for your aquatic creatures.

Hanna HI758 Calcium Checker Marine Aquarium Tester

Accurate and easy to use, this product is a must-have for any aquarium enthusiast looking to monitor and adjust their water chemistry for optimal fish health.

Hanna Instruments HI98319 Marine Salinity Test Kit + 25pc Cal Packs.

Used great condition. I do my best to represent the item as clearly as possible. Key Features & Specs. Temperature Compensation: Features an exposed temperature probe for fast, automatically compensated readings.

Vintage Saxon De Luxe pH Test Kit for Aquariums for Collectability Only 40s-50s

Does have spme damage and staining but this is an amazing display piece. It is used but some items still have contents. Please see pictures for condition

Hanna Instruments Low Range Phosphate Colorimeter - Checker® HC

The Hanna Instruments Low Range Phosphate Colorimeter - Checker® HC is a reliable test kit designed for measuring phosphate levels in marine water. This product from Hanna allows aquarium enthusiasts and pet owners to accurately test and treat their water to ensure optimal conditions for their aquatic pets. With a focus on precision and ease of use, this colorimeter provides accurate results for maintaining healthy water quality in marine environments. Item has low battery and needs reagents

Calcium Colorimeter HI758 Hanna Checker - Marine Water (PRE-OWNED)

Functionality: Fully functional, includes all essential & accessory components to function properly (no reagents included). May have multiple units available - inquire to check for availability! Hobby smarter with affordable, more sustainable options.

Seven Hannah Reef Aquarium Test Kit Bundle

Set of Seven Hannah Reef Aquarium water testers. Great deal! Might need magnesium liquid reagent.

Hanna Handheld colorimeter Marine Calcium (ppm) calcium checker

The Hanna Handheld colorimeter Marine Calcium (ppm) calcium checker is a reliable test kit designed specifically for measuring calcium levels in marine water aquariums. With the trusted brand of Hanna, this handheld colorimeter provides accurate and convenient readings of calcium concentrations in parts per million (ppm). Perfect for fish tank enthusiasts looking to maintain optimal water conditions for their aquatic pets.

Sybon Portable Refractometer Reef Tank, Salinity Testing, Science, Water

Hanna HI758 Marine Calcium Checker Test Kit Saltwater Aquarium

Used in very good condition No reagents The Hanna HI758 Marine Calcium Checker Test Kit is designed for indoor saltwater aquariums, with a specific focus on measuring calcium levels in marine water tanks. This modern test kit includes bottles and packets for easy use, and is compact with dimensions of 9.21x6.54x2.68 inches. Made of dolomite material, the kit is brand Hanna and model HI758, ensuring accurate results for fish enthusiasts. Easy to use and specifically designed for marine aquariums, this test kit is a reliable tool for maintaining optimal water conditions for your aquatic pets.

Hanna Instruments HI774 Checker HC Handheld Colorimeter Marine Phosphate+Reagent

The Hanna HI774 is the Marine Phosphate Ultra Low Range (ULR) Checker, designed to give digital precision to reef hobbyists who need to monitor very low phosphate levels 0.00-0.90ppm. I do my best to represent the item as clearly as possible.

API Freshwater Master Test Kit - EXP 09/2028

API Freshwater Master Test Kit -Barely used plenty of tests remaining -Tests pH, High Range pH, Ammonia, Nitrite & Nitrate -Expires 09/2028

Hannah nitrate low range salt water test kit.

Better than like new.I have refilled all the test Packages, which has lots more than you would get if you bought a new These are the best test kits made.If you ask me , they are easy to use And very quick.

Instant Ocean Reef Crystals Reef Salt 160 lb Bucket - For Reef Aquariums

Instant Ocean Reef Crystals Reef Salt - 160 lb Bucket. Formulation: Designed for Reef Aquariums. Benefits: Higher levels of Magnesium & Calcium, Nitrate & Phosphate Free. Product: Reef Crystals Reef Salt.

MILWAUKEE T71 Microprocessor TDS Tester with automatic temperature compensation

Untested MILWAUKEE T71 Microprocessor TDS Tester is a reliable and efficient tool for testing the water quality in fish tanks and aquariums. With its automatic temperature compensation feature, this tester ensures accurate results without the need for manual adjustments. This product, manufactured by MILWAUKEE Sharp, is designed specifically for water tests and treatment, making it a valuable addition to any pet supplies collection for aquarium enthusiasts. The model T71 is known for its durability and precision in measuring the Total Dissolved Solids (TDS) in water.

Hanna Instruments HI96771 Chlorine Water Quality Tester – Portable Kit. In Case.

Used. Comes With Case

Hanna Instruments Marine Salinity Tester HI98319 Blue/White

With its blue and white design and origin from Romania, this salinity tester provides precise results to help ensure the health and well-being of fish and other aquatic species in your aquarium. Item is like new Open box.

Hanna Instruments - Low Range Phosphate Colorimeter (PRE-OWNED)

Upgrade your tank without draining your wallet. Grade B+: Lightly Used. Why Buy Pre-Owned?. Get high-quality gear for less! Good for your tank & great for the planet. May have multiple units available - inquire to check for availability!

Hanna HI-98319 Marine Waterproof Salinity Temp Test Kit

Within seconds, the salinity and temperature are digitally displayed on the LCD. The compact size makes the HI98319 Marine Salinity Tester ideal for on-the-go testing. The multilevel LCD display provides at-a-glance salinity and temperature readings from any angle while dual button operation streamlines the testing process for any user.

HACH Hardness Test Kit, Model 5B, CAT No. 145300

This has been used.

API Freshwater Master Test Kit Fish Aquarium Tank Exp 2/30 Fishcare Barely Used

API Freshwater Master Test Kit.

Hanna Instruments Low Range Phosphate Colorimeter - Checker® HC

Used about 2 times

Hanna Instruments HI96771 Chlorine Water Quality Tester – Portable Kit. In Case.

Missing glass vial works great used for about 3 months

Fresh Salt Water Fish Tank Aquarium Zeolite Crystals Filter Media Remove Ammonia

This product is new from years ago, but I don’t think this sort of item expires as it is dry and goes into a fish tank filter. It is an 18-ounce plastic jar if it. This can potentially assist with a proper aquarium ecosystem.