Javascript is disabled on your browser.
To view this site, you must enable JavaScript or upgrade to a JavaScript-capable browser.
We use cookies to improve your shopping experience. By continuing to browse our site, you agree to our use of cookies.
Learn more
×
SAVE $10 off $100 with Code:
SITEWIDE10
Aquarium
Air Pumps & Supplies
Air Stones
Aquarium Backgrounds
Aquarium Canopies & Hoods
Aquarium Chillers
Aquarium Filters
Aquarium Lighting & Supplies
Aquarium Stands
Aquarium Timers
Aquatic Pest Control
Automatic Top Offs
Betta Supplies
Cleaning & Maintenance Supplies
CO2 Equipment
Coral Propagation & Aquascaping
Decorations
Dosing Equipment
Filter Media & Cartridges
Fish Breeding
Fish Feeders
Fish Food
Fish Medication
Fish Tank Heaters
Fish Tanks & Fish Bowls
Gravel & Substrate
Planted Aquarium Supplies
Plumbing Parts
Protein Skimmers
Reactors
Reef Supplements
Replacement Parts
Reverse Osmosis Filters & Deionizers
Salt Mixes
Testing Equipment
Tubing
UV Sterilizers
Water Pumps & Power Heads
Water Treatments & Additives
Wavemakers
Dog
Dog Auto Accessories
Dog Beds, Mats & Pads
Dog Bones & Dog Chews
Dog Cleaning Supplies
Dog Clothing
Dog Collars
Dog Crates, Carriers & Pens
Dog Dental Care
Dog Doors
Dog Feeders & Waterers
Dog Flea Control
Dog Food
Dog Gates
Dog Grooming
Dog Harnesses
Dog Health
Dog Houses
Dog Leashes & Leads
Dog Outdoor Gear
Dog Training & Behavior
Dog Treats
Dog Toys
Dog Waste Disposal
Puppy Supplies
Cat
Cat Beds
Cat Carriers & Crates
Cat Doors
Cat Flea & Tick Control
Cat Food
Cat Furniture
Cat Grooming
Cat Health
Cat Litter
Cat Litter Boxes & Supplies
Cat Repellent and Deterrents
Cat Scratchers
Cat Toys
Cat Treats
Catnip & Cat Grass
Cleaning Supplies
Collars, Harnesses & Leashes
Feeders & Waterers
Cat Seasonal Items
Bird
Bird Cage Accessories
Bird Cages
Bird Carriers
Bird Cleaning Supplies
Bird Feeders & Waterers
Bird Food
Bird Grooming Supplies
Bird Health Supplies
Bird Lighting Systems
Bird Perches
Bird Playstands
Bird Toys
Bird Training
Bird Treats
Reptile
Reptile Cages, Terrariums & Accessories
Water Filters, Pumps & Supplies
Hermit Crab Supplies
Hygrometers & Thermometers
Incubators
Reptile Lighting Systems & Supplies
Lighting Timers & Power Strips
Reptile Bedding
Reptile Bulbs & Lamps
Reptile Cleaning Supplies
Reptile Feeding Supplies
Reptile Food
Reptile Habitat Furnishings
Reptile Handling Supplies
Reptile Health Supplies
Reptile Heating
Reptile Kits
Reptile Misters & Foggers
Small Pet
Bedding & Cage Liners
Cage Furnishings & Accessories
Cages & Habitats
Chews
Cleaning & Odor Control
Collars, Harnesses & Leashes
Feeding Supplies
Food
Grooming
Health
Litter Boxes & Supplies
Toys
Travel Crates & Carriers
Treats
Small Animal Clothing
Small Pet Seasonal Items
Pond
Pond Aerators & Supplies
Pond Algae Control
Pond Cleaning Supplies
Pond Fall & Winter Supplies
Pond Filter Media
Pond Filters
Pond Fish Feeding Supplies
Pond Fish Food
Pond Fish Health Supplies
Pond Fountains
Pond Lighting
Pond Liners & Supplies
Pond Miscellaneous Items
Pond Mosquito Control
Pond Nets & Supplies
Pond Ornaments
Pond Plant Supplies
Pond Pumps & Supplies
Pond Replacement Parts
Pond Test Kits & Supplies
Pond Tubing
Pond UV Sterilizers & Supplies
Pond Water Features
Pond Water Treatments
Wild Bird
Wild Bird Accessories
Wild Bird Feeders
Wild Bird Food
Wild Bird Treats
Poultry Supplies
Aquarium Livestock
Corals
Coral Frags
Freshwater Fish
Freshwater Invertebrates
Live Aquarium Plants
Live Fish Food
Live Rock
Saltwater Fish
Saltwater Invertebrates
Gifts
Gift Cards & Certificates
Retail Store Exclusives
Your cart is empty
Contact Us
FAQ
Events
Visit Us
Login
Questions?
Call 1-888-842-8738
Home
/
Aquarium
/
Testing Equipment
/
Probes & Accessories
Back
Testing Equipment
Calibration Solutions
Hydrometers
Monitors & Controllers
Refractometers
Test Kits
Thermometers
See More
See Less
Narrow By
1 Product
Parent Category
Aquarium Supplies
Brand
API
Probes & Accessories
1 Product
Sort & Filter
Display
Show 16 products per page
Show 24 products per page
Show 48 products per page
Sort
Sort by relevance
Sort by price, low to high
Sort by price, high to low
Sort by Popularity
Narrow By
View
API Test Tubes with Caps - 3.5 in. - 24 pk.
$29.99
