No. These are liquid reagent kits read by eye against a printed colour chart – no instrument, calibration or power.

API Test Kit

Q: Which kit do I need for a marine system?

Take the Saltwater Master Kit (APH09). API supplies separate freshwater and saltwater master kits, so match the kit to your water type.

Q: Are the individual kits valid in seawater?

API does not state a salinity limit for the individual kits on our source data. If your system is marine, ask us before ordering a standalone ammonia or nitrite kit.

Q: What is the measuring range and resolution?

Not published by API on our source data. Tell us the detection limit you need and we will confirm before you order.

Q: How many tests do I get?

250 on pH, 180 on nitrite, 160 on high-range pH, 150 on phosphate, 130 on ammonia and 90 on nitrate.

Q: What is the difference between the two master kits?

The Freshwater Master Kit includes the standard pH test as well as high-range pH; the Saltwater Master Kit uses high-range pH only. Both cover ammonia, nitrite and nitrate.

Q: Can I buy refill reagents?

Refills are not listed separately on this page – contact Fresh By Design to check availability for the parameter you need.

Liquid test kits for the water quality parameters that change in a system, sold individually or as a master kit.

Price range: $20.00 through $85.00 ex GST

Option

Clear

Categories: Test Kits, Water Quality Monitoring

Applications: Aquaponics, Hatchery, LSS, Pond, Public Aquarium, RAS, Reef Aquarium

Brand: API

Product Information

Key Features

Individual kits for pH, high-range pH, ammonia, nitrite, nitrate, phosphate, carbonate hardness and general hardness
Freshwater Master Kit (APH41) covers pH, high-range pH, ammonia, nitrite and nitrate in one case
Saltwater Master Kit (APH09) covers high-range pH, ammonia, nitrite and nitrate — API supplies a separate saltwater kit, so match the kit to your water type
Liquid reagent and colour-chart method — no meter, no calibration and no power needed
High test counts per kit: 250 tests on pH, 180 on nitrite, 160 on high-range pH, 150 on phosphate, 130 on ammonia and 90 on nitrate
Compact enough for field work and tank-side checks, with a long shelf life for occasional use
Suits RAS, hatcheries, aquaponics, ponds and display aquaria for routine monitoring and troubleshooting
Choosing your kit: buy by parameter and by water type. For a freshwater system in one box take the Freshwater Master Kit; for a marine or reef system take the Saltwater Master Kit; otherwise buy individual kits for the parameters you actually watch. API does not publish a measuring range or resolution for these kits, so if you need a defined detection limit — a hatchery ammonia target, for instance — ask us before ordering

Specifications

Kit	Parameter(s) measured	Tests per kit	Water type	Code
pH	pH	250	Not stated by supplier	APH22
pH — High Range	pH, high range	160	Not stated by supplier	APH26
Ammonia	Total ammonia	130	Not stated by supplier	APH151
Nitrite	Nitrite	180	Not stated by supplier	APH75
Nitrate	Nitrate	90	Not stated by supplier	APH150
Phosphate	Phosphate	150	Not stated by supplier	APH229
General and Carbonate Hardness	GH and KH	Not published by supplier	Not stated by supplier	APH21
Carbonate Hardness	KH	Not published by supplier	Not stated by supplier	APH145
Freshwater Master Kit	pH, high-range pH, ammonia, nitrite, nitrate	Not published by supplier	Fresh water	APH41
Saltwater Master Kit	High-range pH, ammonia, nitrite, nitrate	Not published by supplier	Seawater	APH09
Note — range and resolution	Measuring range and resolution are not published by API on our source data	—	—	Ask us to confirm before ordering

Frequently Asked Questions

Which kit do I need for a marine system?

Are the individual kits valid in seawater?

What is the measuring range and resolution?

How many tests do I get?

Do I need a meter?

What is the difference between the two master kits?

Can I buy refill reagents?

Spare Parts & Consumables

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API Test Kit

Product Information

Key Features

Specifications

Frequently Asked Questions

Spare Parts & Consumables

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