SimPro Cal-Mag

Name: Simply Professional Formula SimPro Cal-Mag - SimPro Cal-Mag
Brand: Simply Professional Formula
SKU: 44347945386170
Price: 14.95 USD
Availability: InStock
Rating: 5 (4 reviews)

4.5 (1,234)

Sold 100+ last 30 days

20% off first order

$14.95

Quantity

Color

Black

Quantity

Cal-Mag Supplement provides plant-available calcium and magnesium to prevent deficiencies, strengthen plant structure, and support efficient photosynthesis. Designed for RO/soft water, coco, hydroponic systems, and high-demand growth phases, it integrates seamlessly into any SimPro feeding program.

5.0

4 ratings

Everytng thing this company offers is amazing!

Greg · December 23, 2025

Give it a go!

Got my coco buffering dialed in and keeping my garden beautiful and lush 👍🏼

BrownFrown · August 30, 2025

Good stuff

All I use. Works as it should at a fair price.

Chris · April 6, 2025

Simply Professional Formula

5 (69)

Product description loading

This is the product description text that will appear here.

Simply Professional Formula

4-Stage SimPro Line-Up

(2)

$169.95

Simply Professional Formula

Boost Formula

(2)

$42.95

Simply Professional Formula

Transition Formula

(1)

$42.95

Spider Farmer 7-Gallon DWC Hydroponic Growing System | Top Drip Kit, 7-Gallon Deep Water Culture, 2-Bucket Setup, and GGS AC5 Power Strip Kit for Smart Watering Control - LED Grow Lights Depot

15% off

LED Grow Lights Depot

Spider Farmer 7-Gallon DWC Hydroponic Growing System | Top Drip Kit, 7-Gallon Deep Water Culture, 2-Bucket Setup, and GGS AC5 Power Strip Kit for Smart Watering Control

$145.99$170.99

The Hydro Bros

Monkey Nutrients - Mag Cal

(2)

$22.00

Hydro City

Botanicare Cal-Mag Plus

(3)

$23.00

17% off

LED Grow Lights Depot

Mars Hydro Controller 43 Smart Environmental Control System Monitor Temperature Humidity

(1)

$49.99$59.99

Exclusive offer available

Green Rush Nutrients

One-Shot Cal-Mag - Calcium and Magnesium Supplement

(21)

$13.00

Hydro City

House & Garden Commercial Cal Mag

$125.00

Cheap and Easy Hydro Store

Drip Hydro Cal-Mag 5 Gallons (2-0-0)

$97.50

Cheap and Easy Hydro Store

GH CaliMagic Quart (1-0-0)

$14.00

LED Grow Lights Depot

AC Infinity 8" Air Filtration Kit Pro | Smart Controller, Inline Fan, Carbon Filter, Ducting| Shipping End of December 2026

(4)

$359.00

Go Grow

Monkey Nutrients Mag-Cal – Magnesium & Calcium Supplement for Fast-Growing Plants

$9.00

Simply Professional Formula

SimPro Microbes

(2)

$25.95

Simply Professional Formula

SimPro New Clone Formula

$21.95

Simply Professional Formula

Micro Formula

$199.55

Spider Farmer 7-Gallon DWC Hydroponic Growing System | Top Drip Kit, 7-Gallon Deep Water Culture, 4-Bucket Setup, and GGS AC5 Power Strip Kit for Smart Watering Control - LED Grow Lights Depot

13% off

LED Grow Lights Depot

Spider Farmer 7-Gallon DWC Hydroponic Growing System | Top Drip Kit, 7-Gallon Deep Water Culture, 4-Bucket Setup, and GGS AC5 Power Strip Kit for Smart Watering Control

$205.99$235.99

General Hydroponics CaliMagic Calcium Plus Magnesium 1 Quart

14% off

Canada Grow Supplies

General Hydroponics GH CaliMagic Calcium + Magnesium (1-0-0)

(9)

CA$29.95CA$34.99

Exclusive offer available

GrowersHouse

General Hydroponics - CALiMAGic 1-0-0

$16.90

25% off

LED Grow Lights Depot

Spider Farmer 4-Pot Self-Watering System Kits| Shipping Mid August 2026

(2)

$90.00$119.99

20% off

BetterGrow Hydro

General Hydroponics FloraPro Ca + Micros

$65.73$82.17

Add a pop of color

Shop Brooklinen, 2Modern, Revival Rugs, and more

10% off

GS Plant Foods

Cal-Mag Extreme – Calcium & Magnesium Feed | GS Plant Foods

(4)

$25.95$28.95

10% off

Gorilla Grow Tent

Lotus Nutrients Cal Mag for Plants

(45)

$20.65$22.95

37% off

LED Grow Lights Depot

Spider Farmer Drip Irrigation Kit | 8 Emitters

(2)

$57.00$89.99

20% off

BetterGrow Hydro

Botanicare Cal-Mag Plus

$13.97$17.46

Sculptural lamps under $150

Mushroom lamps, orb bases, and pleated cones.

Simply Professional Formula

Veg & Bloom Formulas 50 Gram Sample Packs.

(28)

$10.99

Simply Professional Formula

Potash Formula

$199.55

Spider Farmer 7-Gallon DWC Hydroponic Growing System | Top Drip Kit, 7-Gallon Deep Water Culture, 2-Bucket Setup, and GGS AC10 Power Strip Kit for Smart Watering Control - LED Grow Lights Depot

26% off

LED Grow Lights Depot

Spider Farmer 7-Gallon DWC Hydroponic Growing System | Top Drip Kit, 7-Gallon Deep Water Culture, 2-Bucket Setup, and GGS AC10 Power Strip Kit for Smart Watering Control

$169.99$229.99

The Hydro Bros

Plant Magic MAGNE Cal+

(3)

$12.00

34% off

Modern Farms

Botanicare Cal-Mag Plus

(5)

$109.99$166.75

43% off

LED Grow Lights Depot

Spider Farmer Smart G12 Hydroponics Growing System Indoor Garden

(3)

$72.00$125.99

Cheap and Easy Hydro Store

GH CaliMagic Gallon (1-0-0)

$34.50

Hydro City

General Hydroponics CALiMAGic

$23.00

Atlantis Hydroponics and Garden Supply

Botanicare Cal-Mag Plus

$23.99

Happy Hydro

Botanicare Cal Mag Plus

(6)

$21.95

20% off

BetterGrow Hydro

General Hydroponics CALiMAGic

$14.60$18.25

The Growers Depot

Botanicare® Cal-Mag™ Plus Quart

(2)

$16.99

7% off

Simply Professional Formula

2-Stage SimPro Line-up

(13)

$79.95$85.95

Exclusive offer available

One Stop Grow Shop

Ionic Cal Mag Pro

$13.00

Simply Professional Formula

Nitro Formula

$218.05

Spider Farmer 7-Gallon DWC Hydroponic Growing System | Top Drip Kit, 7-Gallon Deep Water Culture, 4-Bucket Setup, and GGS AC10 Power Strip Kit for Smart Watering Control - LED Grow Lights Depot

12% off

LED Grow Lights Depot

Spider Farmer 7-Gallon DWC Hydroponic Growing System | Top Drip Kit, 7-Gallon Deep Water Culture, 4-Bucket Setup, and GGS AC10 Power Strip Kit for Smart Watering Control

$225.99$255.99

Brand spotlight: Made In Cookware

Stock your kitchen with restaurant-quality cookware.

21% off

LED Grow Lights Depot

Mars Hydro Foldable Bucket Drip Irrigation Kit | Automated Watering for 8 Indoor Plants

$59.99$75.99

HydroPros

Emerald Harvest Cal-Mag

$79.99

Dutchpro

Calmag: Calcium Magnesium Supplement

$31.05

13% off

IGH SUPPLY

Botanicare Cal-Mag Plus 2-0-0

$23.43$26.81

23% off

Grow Space Hydro Store

Botanicare Cal Mag Plus Quart

$19.95$25.82

Cheap and Easy Hydro Store

GH CaliMagic 2.5 Gallon (1-0-0)

$70.00

Cheap and Easy Hydro Store

Botanicare Cal-Mag Plus 5 Gallon (2-0-0)

$110.00

Cheapest Hydro

Botanicare® Cal-Mag™ Plus 5 Gallon

$139.99

Simply Professional Formula

Cactus Formula

(1)

$19.95

GroWell

Ionic Cal Mag Pro

(1)

$13.00

24% off

LED Grow Lights Depot

2026 Spider Farmer SE1500 150W Full Spectrum LED Grow Light | WiFi & Bluetooth App-Controlled

(2)

$126.00$165.99

Exclusive offer available

Perris Hydroponics

General Hydroponics®, CALiMAGic™, 1-0-0, Calcium-Magnesium Supplement (1 Quart)

$15.99$24.99

The Hydro Bros

Advanced Nutrients Sensi Cal Mag Xtra

(1)

$14.00

LED Grow Lights Depot

Spider Farmer 7-Gallon DWC Hydroponic System Kit with 2 Buckets

(1)

$80.00

3% off

Canada Grow Supplies

GreenPlanet Pro Cal (2-0-0)

CA$14.45CA$14.95

Monster Gardens

General Hydroponics CALiMAGic (1-0-0)

$16.15

RAW Calcium/Mag supplement, showing product packaging in multiple sizes from 2oz to 25lb

Exclusive offer available

merchandise.npk-industries.com

RAW Calcium/Mag | 15% Calcium + 3% Magnesium | Water-Soluble Supplement

(1)

$12.85

Vital Garden Supply

Vital Cal-Mag - Liquid Calcium-Magnesium Fertilizer 1-0-0

$27.78

LED Grow Lights Depot

Hydro Sensor for Controller AI+, Precise pH, EC, TDS and Water Temp Data Tracking, Enables Equipment Control Programming| Ships March 6th 2026

$149.00

Golden Valley Hydroponics

Botanicare Cal Mag Plus (5G)

$149.99

Plant Haven Supply

NUTRI+ CM PLUS

$42.00

Simply Professional Formula

Vegetation Formula

(5)

$42.95

Simply Professional Formula

Bloom Formula

(5)

$42.95

LED Grow Lights Depot

Mars Hydro iFresh MarsPro Add-On Pack

$22.99

The Hydro Bros

Dutch Pro - Cal Mag

$25.00

50% off

IGH SUPPLY

Advanced Nutrients Sensi Cal-Mag Xtra

$157.47$314.94

LED Grow Lights Depot

AC Infinity Coco Coir | Instant Potting Mix | 2lbs.

$12.99

Hydroponic nutrient powder for plants grown in water-based systems

Greenway Biotech, Inc.

Cal-Mag Plus 2-0-0 Concentrate

(15)

$33.99

33% off

The Hydro Bros

Advanced Nutrients OG Organics Sensi Cal Mag Xtra

$33.00$49.00

Advanced Nutrients Sensi Cal-Mag Xtra 1L

Exclusive offer available

GrowersHouse

Advanced Nutrients Sensi Cal-Mag Xtra

$51.13

Go Grow

Plant Magic Magne-Cal – Calcium & Magnesium Supplement for Healthy Plant Growth

$22.00

LED Grow Lights Depot

AC Infinity Controller AI+ with CO2 Sensor | AI-Powered Learning, CO2 Data Tracking for Optimized FAE | Temp, Humidity, and VPD Monitoring for Dynamic Level Adjusting Bluetooth & WiFi App| PRE-ORDER

(1)

$169.00

35% off

Growmance Hydro Store

Botanicare Cal-Mag Plus - 1 Gallon

$42.95$66.55

HydroPros

Botanicare Cal-Mag Plus

$14.91

SimPro Cal-Mag

Description

Reviews5.0(4)

Delivery & Returns

Simply Professional Formula

You might also like

4-Stage SimPro Line-Up

Boost Formula

Transition Formula

Spider Farmer 7-Gallon DWC Hydroponic Growing System | Top Drip Kit, 7-Gallon Deep Water Culture, 2-Bucket Setup, and GGS AC5 Power Strip Kit for Smart Watering Control

Monkey Nutrients - Mag Cal

Botanicare Cal-Mag Plus

Mars Hydro Controller 43 Smart Environmental Control System Monitor Temperature Humidity

One-Shot Cal-Mag - Calcium and Magnesium Supplement

House & Garden Commercial Cal Mag

Drip Hydro Cal-Mag 5 Gallons (2-0-0)

GH CaliMagic Quart (1-0-0)

AC Infinity 8" Air Filtration Kit Pro | Smart Controller, Inline Fan, Carbon Filter, Ducting| Shipping End of December 2026

Monkey Nutrients Mag-Cal – Magnesium & Calcium Supplement for Fast-Growing Plants

SimPro Microbes

SimPro New Clone Formula

Micro Formula

Spider Farmer 7-Gallon DWC Hydroponic Growing System | Top Drip Kit, 7-Gallon Deep Water Culture, 4-Bucket Setup, and GGS AC5 Power Strip Kit for Smart Watering Control

General Hydroponics GH CaliMagic Calcium + Magnesium (1-0-0)

General Hydroponics - CALiMAGic 1-0-0

Spider Farmer 4-Pot Self-Watering System Kits| Shipping Mid August 2026

General Hydroponics FloraPro Ca + Micros

Cal-Mag Extreme – Calcium & Magnesium Feed | GS Plant Foods

Lotus Nutrients Cal Mag for Plants

Spider Farmer Drip Irrigation Kit | 8 Emitters

Botanicare Cal-Mag Plus

Veg & Bloom Formulas 50 Gram Sample Packs.

Potash Formula

Spider Farmer 7-Gallon DWC Hydroponic Growing System | Top Drip Kit, 7-Gallon Deep Water Culture, 2-Bucket Setup, and GGS AC10 Power Strip Kit for Smart Watering Control

Plant Magic MAGNE Cal+

Botanicare Cal-Mag Plus

Spider Farmer Smart G12 Hydroponics Growing System Indoor Garden

GH CaliMagic Gallon (1-0-0)

General Hydroponics CALiMAGic

Botanicare Cal-Mag Plus

Botanicare Cal Mag Plus

General Hydroponics CALiMAGic

Botanicare® Cal-Mag™ Plus Quart

2-Stage SimPro Line-up

Ionic Cal Mag Pro

Nitro Formula

Spider Farmer 7-Gallon DWC Hydroponic Growing System | Top Drip Kit, 7-Gallon Deep Water Culture, 4-Bucket Setup, and GGS AC10 Power Strip Kit for Smart Watering Control

Mars Hydro Foldable Bucket Drip Irrigation Kit | Automated Watering for 8 Indoor Plants

Emerald Harvest Cal-Mag

Calmag: Calcium Magnesium Supplement

Botanicare Cal-Mag Plus 2-0-0

Botanicare Cal Mag Plus Quart

GH CaliMagic 2.5 Gallon (1-0-0)

Botanicare Cal-Mag Plus 5 Gallon (2-0-0)

Botanicare® Cal-Mag™ Plus 5 Gallon

Cactus Formula

Ionic Cal Mag Pro

2026 Spider Farmer SE1500 150W Full Spectrum LED Grow Light | WiFi & Bluetooth App-Controlled

General Hydroponics®, CALiMAGic™, 1-0-0, Calcium-Magnesium Supplement (1 Quart)

Advanced Nutrients Sensi Cal Mag Xtra

Spider Farmer 7-Gallon DWC Hydroponic System Kit with 2 Buckets

GreenPlanet Pro Cal (2-0-0)

General Hydroponics CALiMAGic (1-0-0)

RAW Calcium/Mag | 15% Calcium + 3% Magnesium | Water-Soluble Supplement

Vital Cal-Mag - Liquid Calcium-Magnesium Fertilizer 1-0-0

Hydro Sensor for Controller AI+, Precise pH, EC, TDS and Water Temp Data Tracking, Enables Equipment Control Programming| Ships March 6th 2026

Botanicare Cal Mag Plus (5G)

NUTRI+ CM PLUS

Vegetation Formula

Bloom Formula

Mars Hydro iFresh MarsPro Add-On Pack

Dutch Pro - Cal Mag

Advanced Nutrients Sensi Cal-Mag Xtra

AC Infinity Coco Coir | Instant Potting Mix | 2lbs.

Cal-Mag Plus 2-0-0 Concentrate

Advanced Nutrients OG Organics Sensi Cal Mag Xtra

Advanced Nutrients Sensi Cal-Mag Xtra

Plant Magic Magne-Cal – Calcium & Magnesium Supplement for Healthy Plant Growth

AC Infinity Controller AI+ with CO2 Sensor | AI-Powered Learning, CO2 Data Tracking for Optimized FAE | Temp, Humidity, and VPD Monitoring for Dynamic Level Adjusting Bluetooth & WiFi App| PRE-ORDER

Botanicare Cal-Mag Plus - 1 Gallon