Summary  pH is the measurement of active hydrogen ions in a solution. Commercial Edition Aqua Feed and Media Feed; 5.5 - 6.1pH and Coir Feed;  5.6 - 6.2pH.  See Usage Instruc…

What does the acronym ‘ISO’ mean?  Good question! It stands for International Standards Organization, or more correctly, the International Organization for Standardization. What does the IS…