Skip to content

Free shipping on orders over $99* (Exclusions Apply)

Get 5% off your first order! Join our newsletter now!

Aquariums
Aquarium Essentials
- 3D Printed Accessories
- Accessories
  
  All Accessories
  Traps
  Thermometers
- Additives & Supplements
- Controllers & Accessories
- Dosing Equipment
- Filters & Filter Media
  
  All Filters & Filter Media
  Filters
  Filter Media
  Filter Replacement Cartridges
  Filter Socks
  Filter Media Baskets
- Food & Feeding Equipment
  
  All Food & Feeding Equipment
  Marine Foods
  Coral Foods
  Live Foods
  Flakes
  Pellets
  Seaweed
  Feeding Equipment
- Heaters & Chillers
  
  All Heaters & Chillers
  Heaters
  Chillers
- Lighting
  
  All Lighting
  Lighting Accessories
  Lamps & Bulbs
  Light Fixtures
- Maintenance Equipment
- Medications
- Plumbing
  
  All Plumbing
  Flexible Ball-Socket Joint Tubing
  Bulkheads
  PVC Valves
  PVC Unions
  PVC Pipe
  PVC Fittings
  PVC Reducers
  PVC Barb Fittings
- Protein Skimmers & Reactors
  
  All Protein Skimmers & Reactors
  Protein Skimmers
  Media Reactors & Media
- Pumps
  
  All Pumps
  Impellers
  Replacement Parts
- Reverse Osmosis (RO/DI)
  
  All Reverse Osmosis (RO/DI)
  Reverse Osmosis Fittings
- Rocks
- Substrates
- Sump Equipment
  
  All Sump Equipment
  Auto Top Off
- Water Testing Equipment
- Wavemakers & Powerheads
Corals
- SPS Corals
  
  Acropora
  Montipora
  Seriatopora
  Stylocoeniella
  Other SPS
- LPS Coral
  
  Acanthastrea
  Blastomussa
  Chalice
  Cyphastrea
  Elegance
  Euphyllia
  Favites
  Goniopora
  Leptos
  Lobophyllia
  Plate Corals
  Trachyphyllia
  Other LPS
- Soft Corals
  
  Zoanthids
  Mushrooms
  Gorgonians
- WYSIWYG
Saltwater Fish
Invertebrates
Reptile Essentials
Services
Contact Us

Country/region

Canada CAD $
United States USD $

Facebook
Instagram
TikTok
YouTube

Search

Aquariums
Aquarium Essentials
Corals
Saltwater Fish
Invertebrates
Reptile Essentials
Services
Contact Us

Item added to your cart

View cart

Collection: Water Testing Equipment

Sort by:

185 products

Filter:

Brand (0)

Brand

American Marine Inc (17 products)
API (17 products)
Aquaforest (6 products)
Aquarium Depot (4 products)
Aquarium Munster (1 product)
ATI (1 product)
Atoll (1 product)
AutoAqua (2 products)
Brightwell Aquatics (2 products)
Fauna Marin (3 products)
Focustronic (6 products)
Hanna (66 products)
HM Digital (5 products)
HYDROS (1 product)
IceCap (1 product)
Milwaukee Instruments (14 products)
Neptune Systems (6 products)
Oceamo (3 products)
Red Sea (2 products)
Salifert (12 products)
Seachem (11 products)
Tropic Marin (4 products)

Availability (0)

Availability

In stock (173 products)
Out of stock (12 products)

Price

The highest price is $1,999.99

$

From

To

Qualify for Free Shipping (0)

Qualify for Free Shipping

Yes (181 products)
No (2 products)

Same Day Delivery (0)

Same Day Delivery

Yes (141 products)

Special Order (0)

Special Order

Yes (5 products)
No (1 product)

Filter and sort Filter

Filter and sort

Filter

185 products

Brand

American Marine Inc (17 products)
API (17 products)
Aquaforest (6 products)
Aquarium Depot (4 products)
Aquarium Munster (1 products)
ATI (1 products)
Atoll (1 products)
AutoAqua (2 products)
Brightwell Aquatics (2 products)
Fauna Marin (3 products)
Focustronic (6 products)
Hanna (66 products)
HM Digital (5 products)
HYDROS (1 products)
IceCap (1 products)
Milwaukee Instruments (14 products)
Neptune Systems (6 products)
Oceamo (3 products)
Red Sea (2 products)
Salifert (12 products)
Seachem (11 products)
Tropic Marin (4 products)

Clear

Availability

In stock (173 products)
Out of stock (12 products)

Clear

Price

The highest price is $1,999.99

$

From

$

To

Clear

Qualify for Free Shipping

Yes (181 products)
No (2 products)

Clear

Same Day Delivery

Yes (141 products)

Clear

Special Order

Yes (5 products)
No (1 products)

Clear

Sort by:

Remove all

185 products

3D Printed Drying Rack for Hanna Checkers - Holds 6 Cuvettes and caps

3D Printed Drying Rack for Hanna Checkers - Holds 6 Cuvettes and caps

Vendor:
Hanna
- In Stock
- Ships free on eligible orders*
- Same Day Delivery in GTA*

Regular price $24.99

Regular price Sale price $24.99
Unit price per
American Marine PINPOINT Calibration Thermometer

American Marine PINPOINT Calibration Thermometer

Vendor:
American Marine Inc
- In Stock
- Ships free on eligible orders*
- Same Day Delivery in GTA*

Regular price $14.99

Regular price Sale price $14.99
Unit price per
American Marine PINPOINT II Calcium Monitor

American Marine PINPOINT II Calcium Monitor

Vendor:
American Marine Inc
- In Stock
- Ships free on eligible orders*
- Same Day Delivery in GTA*

Regular price $349.99

Regular price Sale price $349.99
Unit price per
American Marine PINPOINT II Calcium Monitor Fluid Kit

American Marine PINPOINT II Calcium Monitor Fluid Kit

Vendor:
American Marine Inc
- In Stock
- Ships free on eligible orders*
- Same Day Delivery in GTA*

Regular price $18.99

Regular price Sale price $18.99
Unit price per
American Marine PINPOINT II Oxygen Monitor

American Marine PINPOINT II Oxygen Monitor

Vendor:
American Marine Inc
- In Stock
- Ships free on eligible orders*
- Same Day Delivery in GTA*

Regular price $349.99

Regular price Sale price $349.99
Unit price per
American Marine PINPOINT II Oxygen Monitor Electrode Fluid

American Marine PINPOINT II Oxygen Monitor Electrode Fluid

Vendor:
American Marine Inc
- In Stock
- Ships free on eligible orders*
- Same Day Delivery in GTA*

Regular price $29.99

Regular price Sale price $29.99
Unit price per
American Marine PINPOINT II Oxygen Monitor Membrane Cap and Fluid Kit

American Marine PINPOINT II Oxygen Monitor Membrane Cap and Fluid Kit

Vendor:
American Marine Inc
- In Stock
- Ships free on eligible orders*
- Same Day Delivery in GTA*

Regular price $29.99

Regular price Sale price $29.99
Unit price per
American Marine PINPOINT ORP (REDOX) Monitor

American Marine PINPOINT ORP (REDOX) Monitor

Vendor:
American Marine Inc
- Backordered
- Ships free on eligible orders*

Regular price $201.99

Regular price Sale price $201.99
Unit price per
American Marine PINPOINT ORP Replacement Probe

American Marine PINPOINT ORP Replacement Probe

Vendor:
American Marine Inc
- Backordered
- Ships free on eligible orders*

Regular price $136.50

Regular price Sale price $136.50
Unit price per
American Marine PINPOINT pH Calibration Fluid 10.000

American Marine PINPOINT pH Calibration Fluid 10.000

Vendor:
American Marine Inc
- In Stock
- Ships free on eligible orders*
- Same Day Delivery in GTA*

Regular price $2.49

Regular price Sale price $2.49
Unit price per
American Marine PINPOINT pH Calibration Fluid 4.000

American Marine PINPOINT pH Calibration Fluid 4.000

Vendor:
American Marine Inc
- In Stock
- Ships free on eligible orders*
- Same Day Delivery in GTA*

Regular price $2.49

Regular price Sale price $2.49
Unit price per
American Marine PINPOINT pH Calibration Fluid 7.000

American Marine PINPOINT pH Calibration Fluid 7.000

Vendor:
American Marine Inc
- In Stock
- Ships free on eligible orders*
- Same Day Delivery in GTA*

Regular price $2.49

Regular price Sale price $2.49
Unit price per
American Marine PINPOINT pH Monitor

American Marine PINPOINT pH Monitor

Vendor:
American Marine Inc
- In Stock
- Ships free on eligible orders*
- Same Day Delivery in GTA*

Regular price $128.99

Regular price Sale price $128.99
Unit price per
American Marine PINPOINT pH Probe

American Marine PINPOINT pH Probe

Vendor:
American Marine Inc
- In Stock
- Ships free on eligible orders*
- Same Day Delivery in GTA*

Regular price $79.99

Regular price Sale price $79.99
Unit price per
American Marine PINPOINT Probe Storage Fluid for pH and ORP-REDOX Probes

American Marine PINPOINT Probe Storage Fluid for pH and ORP-REDOX Probes

Vendor:
American Marine Inc
- In Stock
- Ships free on eligible orders*
- Same Day Delivery in GTA*

Regular price $12.99

Regular price Sale price $12.99
Unit price per
American Marine PINPOINT Salinity Calibration Fluid

American Marine PINPOINT Salinity Calibration Fluid

Vendor:
American Marine Inc
- In Stock
- Ships free on eligible orders*
- Same Day Delivery in GTA*

Regular price $14.99

Regular price Sale price $14.99
Unit price per
American Marine PINPOINT Salinity Monitor

American Marine PINPOINT Salinity Monitor

Vendor:
American Marine Inc
- Backordered
- Ships free on eligible orders*

Regular price $174.99

Regular price Sale price $174.99
Unit price per
American Marine PINPOINT Wireless Thermometer

American Marine PINPOINT Wireless Thermometer

Vendor:
American Marine Inc
- In Stock
- Ships free on eligible orders*
- Same Day Delivery in GTA*

Regular price $29.99

Regular price Sale price $29.99
Unit price per
API Ammonia Test Kit - Freshwater-Saltwater

API Ammonia Test Kit - Freshwater-Saltwater

Vendor:
API
- Backordered
- Ships free on eligible orders*

Regular price $16.99

Regular price Sale price $16.99
Unit price per
API High Range pH Test Kit - Freshwater-Saltwater

API High Range pH Test Kit - Freshwater-Saltwater

Vendor:
API
- In Stock
- Ships free on eligible orders*

Regular price $9.99

Regular price Sale price $9.99
Unit price per

1
2
3
…
10

Quick links

Terms & Conditions
USA & International Orders
Shipping Policy
Livestock Policies
How we care for our fish
AD Same Day Delivery
Privacy Policy
Product Warranty
SMS Exclusive Discounts
Contact Us

Facebook
Instagram
YouTube
TikTok

Country/region

Canada CAD $
United States USD $

Payment methods

© 2025, Aquarium Depot

Refund policy
Privacy policy
Terms of service
Shipping policy

Choosing a selection results in a full page refresh.
Opens in a new window.