SeaChem Multitest: Ammonia Test Kit This kit measures total (NH3 and NH4+) and free ammonia (NH3 only) down to 0.05 mg/L and is virtually interference free in marine and fresh water. Free ammonia is the toxic form of ammonia (vs....
Measures ammonia levels from 0 to 6 ppm in fresh or saltwater in one easy step. Just dip & read! 25 ct