Nutrafin Phosphate Reagent 2 Refill, use with Nutrafin Phosphate (0.0-1.0 mg/L) Test Kit.
The phosphate level should be checked weekly. High phosphate levels are often caused by overfeeding or infrequent water changes, and can lead to algae blooms. Thus, the phosphate level should generally not exceed 1 mg/L.
Size: 10 ml (0.3 fl oz).,