API Saltwater Master Test Kit

A complete water testing kit for marine aquariums, covering four key parameters: high range pH, ammonia, nitrite and nitrate. These are the readings that track the nitrogen cycle and show whether conditions are safe for marine fish and invertebrates, so problems can be picked up before they stress your livestock.

Inside the kit are six test solutions, four glass test tubes with snap-tight caps, a holding tray for storage, and a step-by-step instruction booklet with a computer calibrated, laminated colour card. Results are read by comparing the tube against the colour chart, and the booklet explains what to do if a reading falls outside the safe range. One kit performs over 550 tests.

It suits anyone running a saltwater tank who wants a regular weekly check on water quality, either as part of routine care or when troubleshooting a water problem. It can also be used on aquariums with reef inhabitants, though the reef master test kit is recommended for best results on those systems. Rinse the test tubes with water straight after each test so reagents do not stain the glass, and avoid using soap on them.