Penna tester digitale pH/TDS LCD laboratorio/carta di prova ph per acquario piscina idroponica
TDS: 0-9999ppm. 12-14 shows a very high alkalinity. 8-11 shows alkalinity. This item can be used in: water purifiers and filters, food (vegetable, fruits) & drink quality monitoring, pools and spas, aquariums, hydroponics.