Hanna Instruments GroLine 1.41 mS/cm Conductivity Standard, 230mL HPS & MH Grow Light Bulbs That is because each component

That is because each component of the Fast Fill 121 can be purchased individually

CORRECT MINOR N & K DEFICIENCIES

With dimming capabilities and a voltage range of 120 Volts - 277 Volts

5 is considered too alkaline for most hydroponic gardens

Our specialized design includes a recessed drain well allowing for full drain out

Hanna Instruments GroLine 1.41 mS/cm Conductivity Standard, 230mL HPS & MH Grow Light Bulbs That is because each componentHI7031 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