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• Researched and patented
• Metal bracket (so filter is stable on a flat surface or can be wall mounted)
however VeloKelp is most beneficial during early plant development
US Patent No
Calibration Check Solution for HI9813-6 (25 x 20 mL Sachets) spl_hf • Researched and patentedHI50021P is a premium quality calibration check solution used exclusively for the HI9813 6 portable pH EC TDS Temp. meter. Each sachet has the lot number and expiration date stamped on it and is made of light block foil ensuring freshness each time one is opened. Hanna's line of solutions have been specially formulated to have an expiration of 5 years from the date of manufacture for an unopened sachet. The HI50021P is for 25 sachets containing 20 mL