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When used weekly as a foliar spray throughout the vegetative cycle and into the first week of flowering
HI 9813-6 includes all the features of the HI 9813-5 while incorporating our exclusive CAL CHECKTM feature
saving you time and money
The ES means Extra Strength
Hanna Primo TDS Tester plant-support When used weekly as aPrimo testers provide a fast and dependable way to measure the total dissolved solids or conductivity in your water samples. Each tester is ideally suited for the rigorous demands of water quality professionals. Many professionals use the cabled version of the Primo when demonstrating the before and after results of conditioning and filtration systems. Temperature is compensated automatically to ensure readings are consistent to the standard or
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