The pH-reagent from Tropic Marin, especially developed for freshwater, allows the determination of the pH-value with the help of a finely tuned colour scale, which shows a range of 5.8 - 8.4 pH-units.Tropic Marin test kits are the result of intensive research and development - directed at the needs of the serious aquarist. Extensive testing has been completed to assure accuracy and reliability. Tropic Marin tests are quick and easy to use. The kits contain glass vials, dosage syringes and recommendations to optimize the water quality.Tropic Marin pH Test freshwater:+ measurement range for freshwater: pH 5.8 - 8.4+ accuracy: 0,2 - 0,3+ for determining the pH-value in freshwater aquaria+ quick and easy: just add 1 drop of reagent per measurement+ sufficient for approximately 100 applications+ reagent as refill pack separately available+ allows the determination of the pH-value with the help of a finely tuned colour scale