Nutrafin Calcium Reagent Refills for use with Nutrafin Calcium Test Kit. Marine reef aquariums often require daily testing to ensure that the calcium levels remain at an optimal level for the aquarium inhabitants.
Nutrafin Calcium Reagent Refill #1 for use with Nutrafin Calcium Test Kit. Marine reef aquariums, especially those containing hard corals and strong growth of coralline algae absorb calcium at a rapid rate, often require daily testing to ensure that the calcium levels remain at an optimal level for the aquarium inhabitants. 15ml.