System Hygiene

Home > Indoor Lighting > Best LED Grow Light Height for Seedlings: Distance Chart Last Updated: July 11, 2026 | Fact Checked By: Current Gardening Editorial Team Quick Answer: How High Should LED Lights Be? For young seedlings, a standard 100W to 200W LED grow light should be hung 24 to 30 inches above the canopy with the dimmer set to 25%-50%. If the light is too close (under 18 inches), the seedlings will suffer from light bleach and crispy leaves. If the light is too far (over 36 inches), the seedlings will stretch, becoming weak and “leggy” as they desperately reach for the light source. Always adjust height based…

Home > Indoor Lighting > How to Calculate DLI (Daily Light Integral) Indoors Last Updated: July 11, 2026 | Fact Checked By: Current Gardening Editorial Team Quick Answer: How to Calculate DLI To calculate the Daily Light Integral (DLI) for your indoor plants, you must measure the PPFD (light intensity in µmol) using a PAR meter, multiply it by the total number of hours your lights are on, and multiply that by a constant of 0.0036. The exact formula is: DLI = PPFD × Light Hours × 0.0036. For example, a PPFD of 500 running for 16 hours equals a DLI of 28.8 mol/m²/day, which is perfect for flowering tomatoes….

Home > Hydroponic Systems > Hydroponic Water Chiller Sizing: Choose the Best Unit Last Updated: July 11, 2026 | Fact Checked By: Current Gardening Editorial Team Quick Answer: How to Size a Chiller To size a hydroponic water chiller properly, you must calculate the total gallons in your system and determine the BTU (British Thermal Unit) requirement based on your ambient room temperature. A general rule of thumb is: 1/10 HP (Horsepower) will chill a 10 to 20-gallon reservoir, 1/4 HP handles 30 to 50 gallons, and a 1/2 HP commercial unit is required for 100+ gallon DWC setups. Always oversize your chiller by 20% to prevent the compressor from…

Home > Indoor Environment > Ideal Grow Tent Humidity & VPD Targets for All Stages Last Updated: July 11, 2026 | Fact Checked By: Current Gardening Editorial Team Quick Answer: Ideal Grow Tent Humidity The ideal grow tent humidity drops progressively as your plant ages. Seedlings require 70% to 80% humidity to establish early roots. Vegetative plants thrive at 50% to 70%. Flowering and fruiting plants must be kept strictly between 40% to 50%. Dropping the humidity during the flowering stage is absolutely critical to prevent bud rot (Botrytis) and powdery mildew. Seedling Stage 70% – 80% RH Veg Stage 50% – 70% RH Flower Stage 40% – 50% RH…

Home > Hydroponic Nutrients > Organic Hydroponic Nutrients Guide (Are They Worth It?) Last Updated: July 11, 2026 | Fact Checked By: Current Gardening Editorial Team Quick Answer: Should You Use Organic Nutrients? For 95% of home hydroponic growers, the answer is No. Organic hydroponic nutrients rely on raw, unrefined materials (like fish emulsion, bat guano, and kelp extract). Because hydroponic systems lack the complex microbial life found in healthy soil, these organic compounds cannot be broken down quickly enough for the plant to absorb. Instead, they rot in the reservoir, causing severe pH swings, catastrophic root rot, and clogged water pumps. Unless you are running an advanced bio-filtered system…