Nutrient Mix Calculator

Enter your reservoir size and target EC to get exact gram amounts for your salt recipe.

Crop

Formula

Parameters

Reservoir Volume

≈ 26.4 gal

Target EC (mS/cm)

Source Water EC (mS/cm)— tap / well baseline

Growth Stage auto-fill (Grower+)

UPGRADE

Ionic DashboardLive

EC Breakdown

Source 0.00+ Nutrients 1.80= 1.80 mS/cm

Elemental PPM bars available on Grower plan with Salt Library

UPGRADE

Estimated EC: 1.80 mS/cm

Matches target (1.8 mS/cm) ✓

Ingredient Amounts

Calcium Nitrate (Ca(NO₃)₂)

Calcium + secondary N

63.0g

EC +0.706 mS/cm

Masterblend 4-18-38

N-P-K base

63.0g

EC +0.889 mS/cm

Epsom Salt (MgSO₄·7H₂O)

Magnesium + Sulphur

31.5g

EC +0.205 mS/cm

Mixing Order

1.Half-fill reservoir with water
2.Add Calcium Nitrate first — stir until fully dissolved
3.Add Masterblend 4-18-38 — stir well for 2 minutes
4.Add Epsom Salt last — stir until solution runs clear
5.Top up to target volume, then check EC and pH (target 5.8–6.2)

⚗️ Why mixing order matters

Calcium reacts with sulphates and phosphates in concentrate — creating a white precipitate that permanently locks out those nutrients. Adding each component separately to water prevents this.

Important — verify before use

Results are estimates based on typical EC contribution constants and may vary between batches and water quality.
Always confirm final EC with a calibrated EC meter after mixing — before adding to your reservoir.
Start lower and titrate up, especially for seedlings or sensitive strains.
HiGroPonics accepts no liability for crop loss resulting from use of these calculations.

Mix Details

Formula:Masterblend 3-Part

Date:20 Sept 2026

Volume:100.0 L

Target EC:1.8 mS/cm

Achieved:1.80 mS/cm

Source EC:0 mS/cm

Components

Component	Role	Amount	EC +
Calcium Nitrate (Ca(NO₃)₂)	Calcium + secondary N	63.0 g	+0.706
Masterblend 4-18-38	N-P-K base	63.0 g	+0.889
Epsom Salt (MgSO₄·7H₂O)	Magnesium + Sulphur	31.5 g	+0.205

Mixing Order

Half-fill reservoir with water
Add Calcium Nitrate first — stir until fully dissolved
Add Masterblend 4-18-38 — stir well for 2 minutes
Add Epsom Salt last — stir until solution runs clear
Top up to target volume, then check EC and pH (target 5.8–6.2)

Always dissolve each component separately into water before adding the next.

Loading calculator…

Nutrient Mix Calculator

Enter your reservoir size and target EC to get exact gram amounts for your salt recipe.

Crop

Formula

Parameters

Reservoir Volume

≈ 26.4 gal

Target EC (mS/cm)

Source Water EC (mS/cm)— tap / well baseline

Growth Stage auto-fill (Grower+)

UPGRADE

Ionic DashboardLive

EC Breakdown

Source 0.00+ Nutrients 1.80= 1.80 mS/cm

Elemental PPM bars available on Grower plan with Salt Library

UPGRADE

Estimated EC: 1.80 mS/cm

Matches target (1.8 mS/cm) ✓

Ingredient Amounts

Calcium Nitrate (Ca(NO₃)₂)

Calcium + secondary N

63.0g

EC +0.706 mS/cm

Masterblend 4-18-38

N-P-K base

63.0g

EC +0.889 mS/cm

Epsom Salt (MgSO₄·7H₂O)

Magnesium + Sulphur

31.5g

EC +0.205 mS/cm

Mixing Order

1.Half-fill reservoir with water
2.Add Calcium Nitrate first — stir until fully dissolved
3.Add Masterblend 4-18-38 — stir well for 2 minutes
4.Add Epsom Salt last — stir until solution runs clear
5.Top up to target volume, then check EC and pH (target 5.8–6.2)

⚗️ Why mixing order matters

Calcium reacts with sulphates and phosphates in concentrate — creating a white precipitate that permanently locks out those nutrients. Adding each component separately to water prevents this.

Important — verify before use

Results are estimates based on typical EC contribution constants and may vary between batches and water quality.
Always confirm final EC with a calibrated EC meter after mixing — before adding to your reservoir.
Start lower and titrate up, especially for seedlings or sensitive strains.
HiGroPonics accepts no liability for crop loss resulting from use of these calculations.

Mix Details

Formula:Masterblend 3-Part

Date:20 Sept 2026

Volume:100.0 L

Target EC:1.8 mS/cm

Achieved:1.80 mS/cm

Source EC:0 mS/cm

Components

Component	Role	Amount	EC +
Calcium Nitrate (Ca(NO₃)₂)	Calcium + secondary N	63.0 g	+0.706
Masterblend 4-18-38	N-P-K base	63.0 g	+0.889
Epsom Salt (MgSO₄·7H₂O)	Magnesium + Sulphur	31.5 g	+0.205

Mixing Order

Half-fill reservoir with water
Add Calcium Nitrate first — stir until fully dissolved
Add Masterblend 4-18-38 — stir well for 2 minutes
Add Epsom Salt last — stir until solution runs clear
Top up to target volume, then check EC and pH (target 5.8–6.2)

Always dissolve each component separately into water before adding the next.