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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.
97 results
Red Sea Calcium Pro Test Kit Red Sea Calcium Pro Test Kit
Starting at $34.99
IN STOCK
Red Sea Alkalinity Pro Test Kit Red Sea Alkalinity 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 Nitrate Pro Test Kit Red Sea Nitrate Pro Test Kit
Starting at $42.99
IN STOCK
Red Sea Algae Control Multi Test Kit Red Sea Algae Control Multi Test Kit
Starting at $22.99
IN STOCK
Red Sea Phosphate Pro Test Kit Red Sea Phosphate Pro Test Kit
Starting at $42.99
IN STOCK
Red Sea Iodine Pro Test Kit Red Sea Iodine Pro Test Kit
Starting at $42.99
IN STOCK
Red Sea Potassium Pro Test Kit Red Sea Potassium Pro Test Kit
Starting at $52.99
IN STOCK
API pH Test Kit API pH Test Kit
Starting at $5.48
IN STOCK
API Freshwater Master Test Kit API Freshwater Master Test Kit
Starting at $23.22
IN STOCK
API 5 in 1 Aquarium Test Strips API 5 in 1 Aquarium Test Strips
Starting at $10.24
IN STOCK
API Nitrite Test Kit API Nitrite Test Kit
Starting at $8.06
IN STOCK
API Saltwater Master Liquid Test Kit API Saltwater Master Liquid Test Kit
Starting at $23.22
IN STOCK
Neptune Systems DDR DOS Dual Reservoir Neptune Systems DDR DOS Dual Reservoir
Starting at $199.95
IN STOCK
Neptune Systems Apex Display Module Neptune Systems Apex Display Module
Starting at $99.95
IN STOCK
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