pH 4.01 Meter Calibration Solution General Hydroponics uses the highest quality reference solutions, allowing growers to calibrate many popular brands of pH, EC and TDS meters (NaCl scale or the 442 scale). General Hydroponics technicians check each...

The Rebuild Kit for the Dual Diaphragm Air Pump gives you the option of fixing the pump rather than replacing the entire unit. Kit includes two replacement diaphragms and two replacement lock-nuts. Easy-to-follow instructions make this minor repair a...

Pure, organic plant nutrition for growing plants   BioThrive Grow (4-3-3) provides plants with essential nutrients for roots, stems, and foliage. Made from plant and mineral extracts, the pure and natural vegan formulation encourages beneficial...

FLORAMICRO HARDWATER (5-0-1): If your tap water is over 200 ppm (or contains Calcium above 70 ppm), use FloraMicro Hardwater. If your water contains 30 to 50 ppm Calcium, you can mix our original FloraMicro with FloraMicro Hardwater to create a perfect...

FLORAMICRO HARDWATER (5-0-1): If your tap water is over 200 ppm (or contains Calcium above 70 ppm), use FloraMicro Hardwater. If your water contains 30 to 50 ppm Calcium, you can mix our original FloraMicro with FloraMicro Hardwater to create a perfect...

FLORAMICRO HARDWATER (5-0-1): If your tap water is over 200 ppm (or contains Calcium above 70 ppm), use FloraMicro Hardwater. If your water contains 30 to 50 ppm Calcium, you can mix our original FloraMicro with FloraMicro Hardwater to create a perfect...

FLORAMICRO HARDWATER (5-0-1): If your tap water is over 200 ppm (or contains Calcium above 70 ppm), use FloraMicro Hardwater. If your water contains 30 to 50 ppm Calcium, you can mix our original FloraMicro with FloraMicro Hardwater to create a perfect...

FLORAMICRO (5-0-1): The foundation of the "Building-Block" System. Provides Nitrogen, Potassium, Calcium, and trace elements. The original Building-Block Nutrient System, often imitated but never duplicated. Flora Series contains complete Primary,...

FLORAMICRO (5-0-1): The foundation of the "Building-Block" System. Provides Nitrogen, Potassium, Calcium, and trace elements. The original Building-Block Nutrient System, often imitated but never duplicated. Flora Series contains complete Primary,...

FLORAMICRO (5-0-1): The foundation of the "Building-Block" System. Provides Nitrogen, Potassium, Calcium, and trace elements. The original Building-Block Nutrient System, often imitated but never duplicated. Flora Series contains complete Primary,...

FLORAMICRO (5-0-1): The foundation of the "Building-Block" System. Provides Nitrogen, Potassium, Calcium, and trace elements. The original Building-Block Nutrient System, often imitated but never duplicated. Flora Series contains complete Primary,...

FLORAGRO (2-1-6): Stimulates structural and vegetative growth. Builds strong roots. Provides nitrogen, phosphorous, potassium, and secondary minerals. The original Building-Block Nutrient System, often imitated but never duplicated. Flora Series...