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Articles in Category pH and TDS Meters     Information about the Control Wizard Accurate PH 2 Meter   Information about the Control Wizard Accurate PH 1 Meter   Information about the Control Wizard Accurate PPM 2 Meter   Information about the Control Wizard Nutrawand   I am new to hydroponics, How do I get the TDS number to go down?   What is the size of the Rapid Rooter Plugs? Will they fit in a NetPot? What size?