HydroLogic Stealth-RO300 with Upgraded KDF 85 Filter grow-light-bulbs they are fluted on both

they are fluted on both ends to ease connection to ducting

But it doesn’t have to

Hanna Instruments Direct Soil HALO pH Electrode gives you the ability to measure

and forgiving system

HydroLogic Stealth-RO300 with Upgraded KDF 85 Filter grow-light-bulbs they are fluted on bothStealth RO300 with upgraded KDF 85 filter Removes 98%+ of all contaminants in your tap water including chloramines! Leading the industry in efficiency, the Stealth includes your choice of both 1: 1 and 2: 1 waste to product water ratios. Customized for gardening and hydroponics. The #1 selling filter in gardening and hydroponics for 10+ years, the Stealth RO300 produces 300 GPD of ultra pure water. Includes 4 Stage RO unit, 2 RO membranes, KDF 85