This kit is the ultimate solution for keeping your underwater buddies happy and healthy. Don't settle for less than perfection when it comes to the water quality of your tank - this kit tests four key parameters with incredible accuracy and at an unbeatable price. With seven bottles of liquid test reagent, two computer-calibrated laminated color cards, four glass test tubes with snap-tight caps, and a holding tray, you'll have everything you need to get started. Plus, the step-by-step instruction booklet is chock-full of tips and tricks on how to correct unsafe water conditions.