Applicable Space: fish tanks, shrimp tanks, freshwater fish, pond, aquarium Function: Detect the water of the fish tanks to testing whether your fish tanks is water Put the pond testing strips into the water for 2s and remove it, then hold the strips horizontally for 60 seconds, compare with color chart on bottle to get accurate value of the fish tanks. You can get accurate results within 30s It is good helper for testing your aquarium, fish tanks or pond as testing strips that can the accurate values of water quickly, safely and easily Our aquarium tester papers come with a detailed color chart, detect low levels of impurities and foreign substances, help any invisible water problems and keep your fish safe, Manufacturer: BULAIDAI