NOW $ 10.00
Many marine pH indicators are difficult to read, come cover too broad a range and most fo only a few test. The indicator used in pH MARINE is unique. It is a mixed indicator with an ideal range 7.5 to 8.7. Determinations can be made even without a colour chart. Yellow is too low, purple is too high and a shade of red is in the safe range. A relevant sample of kH-Up, Carbonate Hardness Generator is included in the kit.