Nutrafin Iron Reagent #2 Refill. 5g

Nutrafin Iron Reagent 2 Refill, use with Nutrafin Iron (0.0-1.0 mg/L) Test Kit. It is important to monitor iron levels in order to maintain aquariums that are abundant with plants. It is recommended to test at a frequency that maintains the iron level between 0.25 to 0.5 mg/L.