Hydroponic Reservoir Size Plants Calculator

Budget independently measured plant draw and fixed loop hold-up over caller autonomy/usable tank fraction; no universal liters/plant, root oxygen or hydraulic sizing certification.

Description

Reservoir autonomy combines measured plant draw with fixed loop hold-up.

Reservoir autonomy combines measured plant draw with fixed loop hold-up. Nominal tank size also depends on its usable fraction.^[1]

Enter aligned nonempty integer plant counts 0–1,000,000, nonnegative daily draws/hold-up, nonnegative days and usable fraction strictly above zero through one. Return loop requirements and total nominal liters.

When to use Hydroponic Reservoir Size Plants Calculator

Use Hydroponic Reservoir Size Plants Calculator when you need to evaluate the supplied records under the calculation and evidence rules below. No universal liters/plant, oxygen condition or hydraulic sizing certification is provided.

Prepare the measured crop, container, lighting or inventory records requested. Supply verified local catalogs, calibration factors and crop-stage limits; keep units and dates consistent.

How to use Hydroponic Reservoir Size Plants Calculator and understand its results

Prepare the measured crop, container, lighting or inventory records requested. Supply verified local catalogs, calibration factors and crop-stage limits; keep units and dates consistent.
Enter observedPlantCountsByLoop, measuredDailyPlantDrawLiters, callerAutonomyDays, loopFixedHoldUpLiters, callerUsableTankFraction using the field table and calculation rules, then run the tool.
Read requiredUsableReservoirLitersByLoop, requiredNominalReservoirLitersByLoop, combinedRequiredNominalLiters. The explanation below defines the units, signs, ordering and any flags or placeholder values.
If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.

Input field	Meaning	Value type; see rules below	Requirement
observedPlantCountsByLoop	Observed plant counts by loop	list of number	Required
measuredDailyPlantDrawLiters	Measured daily plant draw liters	list of number	Required
callerAutonomyDays	Caller autonomy days	number	Required
loopFixedHoldUpLiters	Loop fixed hold up liters	list of number	Required
callerUsableTankFraction	Caller usable tank fraction	number	Required

usable=plants×dailyDraw×days+holdUp; nominal=usable/usableFraction

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output field	Meaning	Value type
requiredUsableReservoirLitersByLoop	Required usable reservoir liters by loop	list of number
requiredNominalReservoirLitersByLoop	Required nominal reservoir liters by loop	list of number
combinedRequiredNominalLiters	Combined required nominal liters	number

json

{
  "input": {
    "observedPlantCountsByLoop": [
      10,
      20
    ],
    "measuredDailyPlantDrawLiters": [
      0.2,
      0.1
    ],
    "callerAutonomyDays": 3,
    "loopFixedHoldUpLiters": [
      2,
      3
    ],
    "callerUsableTankFraction": 0.8
  },
  "output": {
    "requiredUsableReservoirLitersByLoop": [
      8,
      9
    ],
    "requiredNominalReservoirLitersByLoop": [
      10,
      11.25
    ],
    "combinedRequiredNominalLiters": 21.25
  }
}

Limitations and assumptions

No universal liters/plant, oxygen condition or hydraulic sizing certification is provided.

Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Numeric lists are limited to 10,000 entries; string lists to 128 strings of at most 128 characters each. The rules above may impose smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.

Alternative or Complementary methods

Use Capillary Mat Reservoir Days Calculator: Reservoir duration can be estimated from recorded daily mat draw plus independently measured other losses. Reserved stock reduces usable water. For a complementary task, use NFT Flow Rate Per Channel Calculator: NFT channel flow can be measured by collecting discharge for a timed interval. Channels need not receive equal shares of pump flow.

References

Hydroponic Reservoir Size Plants Calculator — tool.io

Similar or alternative tools

Capillary Mat Reservoir Days Calculator
Reservoir duration can be estimated from recorded daily mat draw plus independently measured other losses. Reserved stock reduces usable water.
NFT Flow Rate Per Channel Calculator
NFT channel flow can be measured by collecting discharge for a timed interval. Channels need not receive equal shares of pump flow.