Grodan Stonewool (rockwool) is made from molten rock spun into cotton candy-like fibers and then compressed into cubes, blocks, or slabs. Where other rockwool brand manufacturers cut all sizes from one batch of wool, Grodan is unique by making different...

Grodan Stonewool (rockwool) is made from molten rock spun into cotton candy-like fibers and then compressed into cubes, blocks, or slabs. Where other rockwool brand manufacturers cut all sizes from one batch of wool, Grodan is unique by making different...

Pure, organic plant nutrition for flowering plants   BioThrive Bloom (2-4-4) provides flowering and fruiting plants with essential nutrients, perfectly balanced for superior blooms and bountiful harvests. Specially designed to maximize flower,...

Grodan Stonewool (rockwool) is made from molten rock spun into cotton candy-like fibers and then compressed into cubes, blocks, or slabs. Where other rockwool brand manufacturers cut all sizes from one batch of wool, Grodan is unique by making different...

1500 PPM 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...

1500 PPM 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...

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...

Grodan Stonewool (rockwool) is made from molten rock spun into cotton candy-like fibers and then compressed into cubes, blocks, or slabs. Where other rockwool brand manufacturers cut all sizes from one batch of wool, Grodan is unique by making different...

Pure, organic plant nutrition for flowering plants   BioThrive Bloom (2-4-4) provides flowering and fruiting plants with essential nutrients, perfectly balanced for superior blooms and bountiful harvests. Specially designed to maximize flower,...

Grodan Stonewool (rockwool) is made from molten rock spun into cotton candy-like fibers and then compressed into cubes, blocks, or slabs. Where other rockwool brand manufacturers cut all sizes from one batch of wool, Grodan is unique by making different...

This HydroLogic® Pre-Evolution Pre-Filter for the Evolution RO1000 system provides 2 extra stages of filtration and extends the life of the Evolution-RO1000’s carbon filter from 2,000 to 7,500 gallons. This unit is highly recommended for...

This Reverse Osmosis Membrane replaces the one that comes packaged with the Hydro-Logic Stealth RO100 and RO200 reverse osmosis water filtration systems. Replacement Schedule: Replace when product water flow decreases and/or PPM increases. Directions: ...