Fix Nutrient Deficiencies Fast & Boost Plant Growth

Terra Aquatica Cal/Mag — a premium calcium magnesium supplement designed to correct deficiencies, improve nutrient uptake, and maximise plant performance in hydroponics, coco coir, and soil.

If you're seeing yellow leaves, weak stems, slow growth, or blossom end rot, this is the essential additive that restores balance and drives rapid recovery.

The go-to choice for growers searching for the best cal mag in Australia, cal mag hydroponics, or a fast fix for calcium deficiency in plants.

Why Terra Aquatica Cal/Mag Delivers Superior Results

Fast Deficiency Correction — Quickly replenishes calcium and magnesium to prevent growth issues and yield loss.
Stronger Plant Structure — Calcium strengthens cell walls, resulting in thicker stems and improved plant support.
Boosted Photosynthesis — Magnesium is critical for chlorophyll production, driving greener leaves and faster growth.
Prevents Common Plant Problems — Eliminates blossom end rot, tip burn, and interveinal yellowing.
Essential for Coco & RO Water — Prevents calcium lockout and nutrient imbalance in coco coir systems.
Clean & Hydro-Safe Formula — Fully soluble, won't clog drippers or leave residue in hydro systems.

Performance Benefits: Turn Weak Plants Into High Performers

Terra Aquatica Cal/Mag acts as a foundation nutrient stabiliser, ensuring your plants can properly absorb and utilise all other nutrients.

Rapid recovery from deficiencies
Stronger stems and branches
Deep green, healthy foliage
Faster vegetative growth
Improved flowering and fruiting

Full Cycle Support: Veg & Bloom

Vegetative Stage

Supports rapid structural growth
Prevents early calcium deficiencies
Builds strong plant foundations

Flowering Stage

Prevents blossom end rot and tip burn
Supports heavy fruit and flower production
Maintains plant strength under load

The Science Behind Cal/Mag

Calcium (Ca): Builds strong cell walls and improves plant structure
Magnesium (Mg): Powers photosynthesis and energy production

Without these elements, plants cannot efficiently transport nutrients or grow properly — making Cal/Mag one of the most critical additives in any grow system.

How to Use Terra Aquatica Cal/Mag

Suitable For: Hydroponics · Coco Coir · Soil

Dosage: 1–1.5ml per litre (up to 2ml for RO water or heavy feeders)

When to Use: From early growth through flowering

Always add Cal/Mag first to your water before base nutrients for best results.

Perfect For

Hydroponic growers
Coco coir systems
RO water setups
Fast-growing plants
Anyone searching for the best cal mag Australia, coco calmag supplement, or a calcium magnesium deficiency fix

Frequently Bought Together

Terra Aquatica TriPart Micro — the base nutrient Cal/Mag is most commonly stacked with in the TriPart system
Terra Aquatica Humic — improves nutrient uptake efficiency, helping Cal/Mag work harder in the root zone
Terra Aquatica Fulvic — enhances transport of calcium and magnesium into plant cells for faster correction

Frequently Asked Questions

How do I mix Terra Aquatica Cal/Mag Supplement correctly?

Always add nutrients to water, never add water to concentrated nutrients. Fill your reservoir with the target volume of fresh water first, then add each part of Terra Aquatica Cal/Mag Supplement separately, stirring between additions. If using a multi-part formula, add micro or Part A first, then grow or bloom, then any additives. Measure pH and EC after mixing and adjust to your target range — typically 5.8–6.2 pH and 1.4–2.2 EC for most crops.

What is the shelf life of Terra Aquatica Cal/Mag Supplement?

Unopened, Terra Aquatica Cal/Mag Supplement has a shelf life of 2 years when stored in a cool, dark location out of direct sunlight. Once opened, use within 12 months. Shake or stir well before each use as some formulations can settle. Do not freeze concentrated nutrients as this can cause precipitation of minerals that will not fully redissolve.

Can I use Terra Aquatica Cal/Mag Supplement in soil as well as hydroponics?

Terra Aquatica Cal/Mag Supplement is formulated for hydroponic systems but can be used for soil and coco growing at adjusted rates. Soil typically requires lower EC than hydro or coco as nutrients are buffered by the growing medium. Start at 50–70% of the recommended hydroponic dose when applying to soil and increase based on plant response.

How do I dispose of leftover nutrient solution made with Terra Aquatica Cal/Mag Supplement?

Dilute spent nutrient solution with water and use it to water outdoor garden beds or lawns — it is an excellent fertiliser for outdoor plants. Avoid disposing of large volumes directly into storm drains. In residential situations, diluted nutrient runoff down a household drain is acceptable in small quantities.

Does Terra Aquatica Cal/Mag Supplement ship fast within Australia?

Yes — Terra Aquatica Cal/Mag Supplement ships from our Australian warehouse with fast tracked delivery Australia-wide. Most east coast orders arrive within 2–5 business days. WA, NT, and TAS orders typically arrive within 5–12 business days.