- Home
- Aquarium Water Test Kits
Aquarium Water Test Kits

Seachem pH Alert
$7.90 $9.48
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...

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...

Seachem Reef Status Test Kit - Magnesium/Carbonate/Borate - 150 Tests
$43.27 $51.93
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
$34.97 $41.97
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
$15.85 $19.02
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
$15.85 $19.02
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
$15.85 $19.02
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
$15.85 $19.02
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
$39.96 $47.95
This kit combines the marine ph & alkalinity, ammonia and nitrite & nitrate kits into one kit.

Seachem MultiTest - Iron - 75+ Tests
$15.85 $19.02
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
$15.85 $19.02
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
$15.85 $19.02
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
$7.90 $9.48
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
$15.78 $18.93
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 ...

Seachem Alert Combo Pack - 6 Months
$10.21 $12.25
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 $17.64
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 $22.29
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...

Salifert Phosphate Test Kit
$19.36 $23.23
Salifert's Phosphate Test Kit helps prevent problematic phosphate build-ups by allowing you to detect the problem early. Too much phosphate in your aquarium can result in slowed coral growth, while pest algae growth is accelerated. Fish food is the most common source of phosphate input in aquariums, and levels above 0.05 mg/L can already prove p...

Salifert Nitrate Test Kit
$17.15 $20.58
The Salifert Nitrate Test Kit measures the extremely hazardous nitrate levels that build up in spaces which have been deprived of oxygen. High nitrate levels can lead to undesirable algae-growth and coral damage. The ideal nitrate concentration in a healthy reef system should be lower than 1 mg/L, but fish based aquariums may show drastically hi...

Salifert Nitrite Test Kit
$11.70 $14.04
The Salifert Nitrite Test Kit measures the extremely hazardous nitrite levels that build up in aquariums due an interference in the nitrogen cycle. Nitrites are typically converted into nitrates and removed throughout the nitrogen cycle, but when the cycle cannot be completed, these nitrites begin to build up and cause damage to the inhabitants ...

Salifert Calcium Test Kit
$18.58 $22.29
The Salifert Calcium Test Kit is an accurate testing kit for saltwater environments. It measures the level of calcium, an important component to the growth of the skeletal structure of various coral species as well as benefiting the biological processes of many other organisms. The ideal level of calcium in a tank should be 400 - 450 mg/l and sh...

Salifert Ammonia Test Kit
$13.80 $16.56
The Salifert Ammonia Test Kit is a straightforward, accurate testing kit for saltwater environments that measures the sum of toxic ammonia and ammonium. Immediate results within minutes. Can perform up to 50 accurate tests and can detect 0.5 ppm of total ammonia.

Salifert Magnesium Test Kit
$19.36 $23.23
The Salifert Magnesium Test Kit measures the magnesium content in saltwater aquariums. In nature, magnesium is present in rather high concentrations such as 1300 - 1400 mg/L, and contributes heavily to photosynthesis, a process that sharply determines the growth and health of aquatic plants, algae and corals. Magnesium plays an important role in...