Working calculators
Nutrient PPM by StageRight nutrient concentration for plant lifecycle. DLI by Crop and LightDaily Light Integral target for your crop and light setup.Guides
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3-part nutrient solutionGeneral Hydroponics Flora Series is the most widely documented system — easy to find feeding schedules for almost any crop. Start with manufacturer ratios.
Digital pH meter + calibration fluidBluelab and Apera make meters that stay calibrated. Cheap pens drift within weeks. Keep calibration solution on hand.
Rockwool / starter cubesRapid Rooter plugs for seeds; 1.5-inch rockwool cubes for clone starts. Pre-soak rockwool to pH 5.5 before use.
Full-spectrum LED grow lightQuantum board LEDs (Mars Hydro, Spider Farmer) run cooler and more efficiently than blurple panels. 240–300W covers a 4×4 tent.
Net pots + grow media3-inch net pots with clay pebbles (Hydroton/LECA) are the default for DWC and Dutch bucket systems. Rinse clay pebbles before first use.