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Shop All Controllers & Testing

Controllers & Testing Equipment allow convenient measurement of important aquarium parameters. Choose from our great selection to help simplify maintenance of freshwater or saltwater aquariums. High-tech digital controllers and monitors boast precision lab-grade quality to streamline testing and monitoring of vital aquarium water parameters.
78 results
On Sale
Instant Ocean Hydrometer Instant Ocean Hydrometer
Starting at $7.99
IN STOCK
Red Sea Calcium Pro Test Kit Red Sea Calcium Pro Test Kit
Starting at $34.99
IN STOCK
Red Sea Magnesium Pro Test Kit Red Sea Magnesium Pro Test Kit
Starting at $34.99
IN STOCK
Red Sea Algae Control Multi Test Kit Red Sea Algae Control Multi Test Kit
Starting at $59.99
IN STOCK
Red Sea Iodine Pro Test Kit Red Sea Iodine Pro Test Kit
Starting at $42.99
IN STOCK
API pH Test Kit API pH Test Kit
Starting at $6.59
IN STOCK
API Freshwater Master Test Kit API Freshwater Master Test Kit
Starting at $24.59
IN STOCK
API 5 in 1 Aquarium Test Strips API 5 in 1 Aquarium Test Strips
Starting at $10.59
IN STOCK
API Nitrite Test Kit API Nitrite Test Kit
Starting at $9.99
IN STOCK
API Saltwater Master Liquid Test Kit API Saltwater Master Liquid Test Kit
Starting at $24.59
IN STOCK
Neptune Systems DDR DOS Dual Reservoir Neptune Systems DDR DOS Dual Reservoir
Starting at $199.95
IN STOCK
Neptune Trident and Apex Bundle Neptune Trident and Apex Bundle
Starting at $1,399.90
IN STOCK
Neptune Trident and ApexEL Bundle Neptune Trident and ApexEL Bundle
Starting at $1,099.90
IN STOCK
New Product
Neptune Trident, DOS, and Reservior Bundle Neptune Trident, DOS, and Reservior Bundle
Starting at $1,099.85
IN STOCK
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