Buy the right size the first time.

• Which inline fan do I need?An inline fan should replace the air in your tent about once a minute. Too small and heat and humidity build up; too big and you waste power and noise. Use the calculator, then add the correction factors.
• How much light for my tent?Light is measured in PPFD (µmol/m²/s) at canopy level, not in watts. But for choosing a fixture, wattage per square foot is a reliable shortcut.
• Carbon filter sizingA carbon filter removes odor only if the air passes through it slowly enough. Pick the filter by the fan's CFM and the duct size, and expect to replace it every 12–18 months.
• Hydroponics for beginnersHydroponics raises plants in water and nutrients instead of soil. Faster, cleaner and easier to automate — once the basics are in place.