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Calcimator

NFT Channel Design

Design a Nutrient Film Technique (NFT) hydroponic system by calculating channel count, pump capacity, plant spacing, and flow velocity from your plant count and layout.

Inputs

ft
GPH

Results

Channels Needed

6

Total Pump Capacity

180 GPH

Pump Capacity (GPM)3 GPM
Plant Spacing9.6 inches
Total Channel Length48 ft
Flow per Plant3 GPH
Min Reservoir Size60 gal
Recommended Reservoir120 gal
Flow Velocity2.41 ft/min
Flow AssessmentHigh — monitor root health
How to Use This Calculator
  1. Enter your total plant count, desired plants per channel, and channel length in feet.
  2. Enter the flow rate per channel in GPH — NFT channels typically run 0.5–2 GPH per channel for a thin nutrient film.
  3. Review Channels Needed, Total Pump Capacity (GPH/GPM), and Plant Spacing (inches).
  4. Use Min Reservoir Size (gal) and Recommended Reservoir to select a reservoir that prevents the solution from recirculating too quickly.
  5. Check Flow Assessment and Flow per Plant (GPH) to confirm adequate nutrient delivery without flooding the channels.
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