NTlabs Phosphate Test Kit

The NT Labs Phosphate Test Kit lets you quickly and reliably measure phosphate levels (PO₄) in freshwater or marine aquariums — an important step in preventing algae outbreaks and maintaining stable water chemistry. The kit uses a simple liquid-reagent method: you add a water sample, apply the reagents, shake, wait five minutes for the colour change, then compare the result to the included chart to get a phosphate reading. A typical reef aquarium aims for very low phosphate (around 0.03 mg/L) to support healthy coral growth and minimise nuisance algae.