Deep water culture suspends plant roots in an oxygenated nutrient solution. It is simple and fast-growing, but needs the right solution volume, nutrient dose and enough air.
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Enter your containers, fill level and nutrient label dose. The calculator gives the solution volume, nutrient doses and the air pump size.
solution = containers × size × fill nutrient per part = solution × dose air pump ≈ 1 L/min of air per 4 L of solution
The air rule is a common grower's guideline; more air rarely hurts in DWC.
Four 19 L buckets filled to 80% hold 60.8 L of solution. At 2 ml per litre per part, add 30 ml of each part per bucket (122 ml in total per part), and use an air pump of at least 15 L/min.
About 1 L/min of air for every 4 L of solution (roughly 15 gal/h of air per gallon), with one air stone per container.
Every 1–2 weeks, topping up with plain water or a weak solution in between.
About 5.5–6.5 for most crops.
At first, just touching the bottom of the net pot; lower it as roots grow to leave an air gap.