7 in 1 pool test strips,hot tub pool spa salt pool test strips,aquarium fish tank water tropical test strips kit nitrite strip;With the Aqua Quick Test you can monitor 7 values which are crucial for good water quality: pH (acidity) KH (carbonate hardness) GH (general hardness) NO2 (nitrite) NO3 (nitrate) Bromine (brome) and Chlorine.Suitable for drinking water, aquarium, swimming pool and spa, industrial water, pond, hot spring water Specifications: *Item type: Swimming Pool SPA Test Strips *Material: Paper *Color: As pictures *Quantity: 50pcs/bottle Package includes: 1 bottle of Pool SPA Test Strips (Total 50PCS) Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. *7 in 1 Pool and Spa water quality test strips. *Easy to distinguish: Color difference is obvious, easier to compare the strip color to the color chart. *Test at both ends of pool twice a week for best results. *Dip in water for instant reading and comes in easy-to-store container. *Perfect for swimming pool and spa test.