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5 is considered too alkaline for most hydroponic gardens
That is because each component of the Fast Fill 121 can be purchased individually
It is recommended to be used within 30 days of opening
CORRECT MINOR N & K DEFICIENCIES
Hanna Instruments GroLine 1.41 mS/cm Conductivity Standard, 230mL HPS & MH Grow Light Bulbs 5 is considered too alkalineHI7031 023 is a GroLine 1,413 S cm conductivity standard that is prepared against a NIST traceable potassium chloride solution and supplied with a certificate of analysis. Hanna conductivity solutions have the lot number and expiration date clearly marked on the label and are air tight with a tamper proof seal to ensure the quality of the solution. Hanna's line of conductivity standards have been specially formulated to have an expiration of 5 years
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