Tests calcium carbonate hardness phosphate and nitrate levels quickly and accurately; calibrated specifically for reef aquariums.

ARP:$48.89Price : $42.99

For use in reef aquariums; tests calcium levels as low as 20 milligrams per liter.

ARP:$13.49Price : $11.99

Tests copper levels from 0 to 4 ppm in fresh or saltwater; measures both free and chelated copper

ARP:$12.39Price : $10.99

Measures inorganic phosphate to less than 0.05 mg/l; multi-cavity plate for testing up to 6 tests at a time. Marine or freshwater.

ARP:$25.49Price : $22.99