- Home
- Aquarium Water Test Kits
Aquarium Water Test Kits

Seachem pH Alert
$7.76 $9.31
pH Alert is a unique color device designed to be placed in your aquarium or filter to continuously monitor pH. A sensor changes color to alert you of fluctuations in your aquarium's pH level, ranging between 5.8 and 8.6. Provides constant readings. pH Alert is small, clear, and unobtrusive so it won't detract from the attractiveness or view of y...

Seachem Alert Combo Pack - 6 Months
$10.07 $12.08
No strips, no tests, just constant readings. Now Ammonia Alert and pH Alert come together! Ammonia Alert and pH Alert employ Seachem Sensor Technology; a sensor changes color reversibly to alert you to shifts in ammonia levels and shifts in pH respectively. Simply place them visibly anywhere in the aquarium or filter and read anytime. It's that ...

Salifert Copper Test Kit
$16.74 $20.09
The Salifert Copper Test Kit is an accurate testing kit for saltwater environments. It measures the level of copper, which is routinely found in untreated tap water and is used as a medical aid for fish with various ailments. However, when the copper levels reach a certain point, their beneficial aspects become harmful and can impact the inhabit...

API pH Test Kit - Freshwater
$7.98 $9.58
Proper pH control is imperative when caring for fish in a freshwater aquarium. Water that is either too alkaline or too acidic can have harmful effects on fish and plant life, so it's important to maintain consistent levels to keep your fish healthy and your aquarium thriving. This API pH Test Kit is a simple and accurate way to make sure your w...

Tetra Easystrips Complete Aquarium Test Strips Kit Aquarium Water Test Kit - 25 Pack
$25.65 $30.78
• Complete testing of ammonia ph nitrate nitrite hardness alkalinity and chlorine. • Results in 60 seconds. • 25 strips per package.

Tetra Easystrips 6-In-1 Aquarium Test Strips Aquarium Water Test Kit - 25 Pack
$13.17 $15.80
• Complete testing of ph nitrite nitrate hardness alkalinity and chlorine. For freshwater and saltwater • Results in 60 seconds. • 25 strips per package.

Tetra Easystrips Ammonia Aquarium Test Strips Aquarium Water Test Kit - 25 Pack
$13.71
• Fast accurate and easy to use test strips for freshwater and saltwater aquariums • Results in 10 seconds. • 25 strips per package.

Instant Ocean Full Range Aquarium Hydrometer - 4 Lbs
$12.46 $14.95
• Tests aquarium salt levels and specific gravity. • Easy read 2 color scale with safe zone. • Improved no wet hands design. • Extra wide stabilizer base. • Accurate to +0.001. • Full range scale. INGREDIENTS: Hard Plastic

Seachem Reef Status Test Kit - Magnesium/Carbonate/Borate - 150 Tests
$42.62 $51.14
Four kits in one! Tests for magnesium through a titration based procedure in increments of 12.5 mg/L. Tests for carbonate alkalinity, borate alkalinity and total alkalinity in 0.1 meq/l resolution through a titration based procedure. The kit resolves borate from carbonate and, along with magnesium, this presents a clear picture of the tank's buf...

Seachem Reef Status Test Kit - Calcium - 150 Tests
$34.44 $41.33
This kit measures all types of calcium, including gluconate calcium. The method is based on specific titration with a unique indicator. Measures in increments of 5 mg/L. Each kit runs 150 tests.

Seachem MultiTest - Marine pH/Alkalinity - 75 Tests
$15.61 $18.73
This kit features a unique dye that has a pronounced color change between 8.0 to 8.3, making it the easiest kit on the market to read in that critical range. Alkalinity may be read from the same sample in 0.5 or 1 meq/l increments.

Seachem MultiTest - Nitrite/Nitrate - 75+ Tests
$15.61 $18.73
This kit measures nitrite down to 0.2 mg/l and nitrate down to 2 mg/l in marine or freshwater.

Seachem MultiTest - Phosphate - 75+ Tests
$15.61 $18.73
This kit measures inorganic phosphate down to 0.05 mg/l, producing a unique easy to read yellow-green-blue color range in marine and freshwater.

Seachem MultiTest - Iodine/Iodide - 75+ Tests
$15.61 $18.73
This kit measures iodine or iodide to less than 0.005 mg/L. Seachem stands alone in offering this important test to the reef aquarian.

Seachem MultiTest - Marine Basic - 75+ Tests
$39.34 $47.21
This kit combines the marine ph & alkalinity, ammonia and nitrite & nitrate kits into one kit.

Seachem MultiTest - Iron - 75+ Tests
$15.61 $18.73
This kit measures iron in freshwater or marine water to less than 0.05 mg/L. Can also measure chelated iron.

Seachem MultiTest - Ammonia - 75 Tests
$15.61 $18.73
This kit measures total (NH3 and NH4+) and free ammonia (NH3 only) down to 0.05 mg/l and is virtually interference free in marine and freshwater. Free ammonia is the toxic form of ammonia (vs. Ionized ammonia NH4+ which is non-toxic) and thus it is much more important to keep an eye on the level of free ammonia in your system. This kit is based ...

Seachem MultiTest - Copper - 75 Tests
$15.61
This kit measures copper (all types) down to 0.01 mg/l in marine or freshwater. Uses a highly sensitive catalysis based procedure.

Seachem Ammonia Alert
$7.76 $9.31
Ammonia Alert™ is an innovative color device for continuously detecting and monitoring toxic free ammonia. A sensor changes reversibly from yellow to green to blue, relative to the ammonia concentration. No test kits, chemicals, or procedures are needed. The device detects less than 0.05 mg/L (ppm) free ammonia and alerts you to the #1 killer be...

Seachem Alert Combo Pack - 1 Year
$15.53 $18.63
No strips, no tests, just constant readings. Now Ammonia Alert and pH Alert come together! Ammonia Alert and pH Alert employ Seachem Sensor Technology; a sensor changes color reversibly to alert you to shifts in ammonia levels and shifts in pH respectively. Simply place them visibly anywhere in the aquarium or filter and read anytime. It's that ...

Salifert pH Test Kit
$10.79 $12.95
Salifert's pH Test Kit provides you with quick and precise test results for one of the most crucial parameters to measure in your aquarium, pH. The pH value of your aquarium can have severe ramifications, including impacting coral growth and disrupting biological processes in your fish. It's very important to keep the pH in your aquarium stable,...

Salifert Oxygen Test Kit
$14.70
Salifert's Oxygen Test Kit provides you with a quick and accurate reading of one of the most vital (and difficult to test) parameters of your aquarium: oxygen itself. Knowing how much oxygen is mixed into your saltwater aquarium's water is highly important for healthy corals and other marine fish, which require oxygen concentrations at saturatio...

Salifert Potassium Test Kit
$18.58
Salifert's Potassium Test Kit provides a quick, accurate, and reliable method for measuring potassium levels in your reef aquarium. Potassium test kits are notoriously difficult to use on average, but Salifert's kit provides a method to take potassium readings without the stress and headache, giving you a precise analysis in minutes. In naturall...