ICP Water Analysis Plus is a professional lab water test - your sample is analyzed via ICP-OES for a full breakdown of dissolved elements, plus additional methods covering other key parameters and nutrients. A reverse osmosis water sample is tested alongside your tank water to check your source water too.What's included 2 empty 15 mL cuvettes (white lid) for tank water 1 empty 15 mL cuvette (red lid) for RO/DI water 1 empty 50 mL cuvette (white lid) Syringe and syringe filter Sample labels and return packaging How it works Register your aquarium and sample number at lab.tropic-marin.com (or scan the QR code on the label) - samples can't be matched to results without this step Rinse the white-lid vials with aquarium or RO water, then collect your tank water sample per the included instructions Rinse and fill the red-lid vial with RO/DI water Label each cuvette and mail them back using the provided address label Results are emailed as a PDF and available online, where you can also track your tank's water chemistry history over time and get dosing recommendations (using Tropic Marin Block or Components solutions) for any imbalances found.Available for local pickup - in-store only.