Tired of guessing whether your water's nutrient levels are adequate? Hydro Rx takes the guess-work out of water management. Hydrofarm Test Lab has developed a kit that lets you manage your plants' nutrients with lab-tested precision. Hydro Rx is simple: Just take a source water, hydroponic solution, or soil sample and send it back to Hydrofarm Test Lab in the enclosed mailing envelope. Within 2-4 business days, you'll receive a detailed water analysis. Test results are available online or by email.
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