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Aquarium Supplies  

Additives
Air Pumps
Aquariums
Books & Cd's
Calcium Reactors
CO2 Regulator Kits
Chillers
Controllers
Dosing Pumps/Top-Off
Filters
Filter Media
Food
Freshwater Products
Heaters
Hydrometer
Lighting
Maintenance
Medications
Miscellaneous
Overflow Boxes
Ozonizers
Plumbing Parts
Powerheads
Protein Skimmers
Pumps (External)
Reverse Osmosis
Salt Mix
Substrate
Test Kits
Thermometers
UV Sterilizers
Wavemakers
Wet/Dry Filters









Water Test Kits
Using test kits to detect problematic water conditions is key to the sustainability of a healthy aquarium. Test kits utilize a wide variety of dry chemical powder and liquid solution reagents and may be supplemented by an electronic monitor.

Elos, Tropic Marin, Seachem and Aquarium Systems test kit lines are all well-regarded for their affordability and accuracy.

For a fish-only tank, you should measure and monitor pH, alkalinity, ammonia, nitrite, and nitrate levels. In addition to these, you should also monitor the calcium, magnesium and strontium levels in a reef aquarium. By testing your water, you will know what additives you will need to use to keep your tank at its healthiest.

Phosphate, silicate and nitrate levels have a significant impact on annoying algae growth. Test kits can be quite handy, should you run into problems with excessive algae growth.

To learn more about water testing and test kits, please read Choosing a Test Kit and Reef Tank Water Testing in the Marine Depot Knowledgebase.
Test Kits
Aquarium Pharmaceuticals Test Kits
Aquarium Pharmaceuticals produces a complete line of liquid test kits for testing saltwater and freshwater aquariums. Single and master kits available.
Aquarium Systems Instant Ocean Test Kits
Aquarium Systems Instant Ocean test kits include step-by-step instructions to make water testing quick, easy and mistake-proof. Novice and expert aquarists alike trust Instant Ocean Calcium, pH and Alkalinity test kits for their ease-of-use and reliable readings.
D-D ROWA Merck Phosphate Test Kit
Simple to use and incredibly sensitive down to the low levels required for both saltwater and freshwater aquarium use.
Elos Test Kits
Elos’ reputation for applying the latest advances in marine and freshwater sciences into their products has garnered the respect of hobbyists from around the globe. Marine Depot is the only online retailer to carry Elos’ full line of test kits.
Hagen Test Kits
Easy to use, convenient, accurate and provide every aquarium owner with a number of advantages. For fresh and saltwater use.
LaMotte Test Kits
High-End Water Test Kits that are faster, easier-to-use, and reduce or eliminate the use of hazardous materials.
Red Sea Test Kits
Red Sea produces individual and multi-use test kits for marine and reef aquaria. Red Sea test kits are easy to use and extremely affordable, with individual test kits starting under $12.
Salifert Test Kits
One of the most popular test kits we sell. Excellent, reasonable-priced high-end test kits. Easy to use and accurate.
SeaChem Laboratories Test Kits
SeaChem has been producing quality test kits at affordable prices for nearly 30 years. Individual and multi kits are available for testing Ammonia, Calcium, Nitrite, Alkalinity, Magnesium and more.
Tetra Test Kits
Multi test kits and individual test kits for ponds, freshwater & saltwater aquariums. Affordable and easy to use.
Tropic Marin Test Kits
Tropic Marin Water Test Kits are the result of intensive research and development - directed at the needs of the serious aquarist. Extensive testing has been completed to assure accuracy and reliability.
Tunze Test Kits
Tunze’s bio-chemical measuring kits render important chemical data. The measuring ranges and indicating accuracies of their Calcium, Carbonate Hardness, Iron, Nitrate, Nitrite, Ammonia and Phosphate are superior to other aquarium test kits on the market today.
Test Equipment
American Marine PinPoint Electronic Monitors
Pinpoint Aquarium Controllers and Monitors, an affordable and accurate line of portable digital monitoring equipment for pH, mV (ORP), O2 and Salinity.
Hanna Instruments Water Test Equipment
Hanna Instruments manufactures a high-quality line of handheld testers (pH, TDS, Temperature, ORP), Photometers (one of the most accurate ways to test for phosphates), replacement electrodes and calibration solutions for aquarium testing.
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