Liquid Ca/Mg/Fe supplement purpose-built for inert media and RO-water programs.
Athena Blended CaMg (2-0-0) is a liquid calcium, magnesium, chelated iron, and nitrate-nitrogen supplement designed to correct deficiencies in demanding grow conditions — specifically inert media like coco and rockwool, and programs running reverse osmosis water. Formulated to integrate cleanly with Athena's Blended Grow A/B and Bloom A/B two-part base without shifting overall elemental balance.
Athena CaMg is a liquid supplemental nutrient in the Athena Blended Line — a two-part, no-dry-salt liquid programme built around Grow A/B for vegetative stages and Bloom A/B for flowering. CaMg sits alongside those base parts as an on-demand corrective, not a mandatory feed component.
The guaranteed analysis breaks down to 2% total nitrogen (100% nitrate-N), 2.1% calcium, 1.1% water-soluble magnesium, and 0.06% chelated iron. The nitrate-nitrogen carrier keeps calcium mobile in solution and contributes a small, predictable nitrogen load that doesn't distort your EC targets. The chelated iron form maintains bioavailability across a broader pH range than non-chelated iron salts.
The formula is sediment-free and compatible with all dosing and irrigation systems — Dosatron injectors, drip manifolds including fine dripper heads, and recirculating reservoirs. Small micro-particles may occasionally be visible under certain conditions but do not affect mineral balance or system compatibility.
The Athena Blended base formulas (Grow A/B, Bloom A/B) include calcium and magnesium at levels sufficient for many cultivars and water sources. CaMg is the tool for the situations where that baseline falls short.
The two most common triggers are inert media and RO water. Coco coir and rockwool do not buffer or contribute calcium or magnesium the way soil does — what's in the solution is what the root sees. Reverse osmosis water strips the residual hardness (Ca/Mg) that tap water provides. Either condition, or both together, typically demands supplementation throughout the entire growth cycle.
Beyond the media and water-source triggers, high-feeding cultivars and plants in aggressive vegetative push can outrun the Ca/Mg load in the base at standard doses. Signs include tip burn, interveinal chlorosis on younger leaves, and blossom-end softening in fruiting tissue — all addressable before they set back yield if CaMg is dialled in proactively.
Standard starting rate is 2.5 mL per gallon of water across all growth stages. Athena's official label documents a range of 2–10 mL per gallon, leaving room to titrate up for heavy-feeding cultivars or low-baseline RO programs. Always dial dose against your runoff EC and plant response rather than running a fixed number.
Mix order matters in multi-part programs: dilute CaMg into the reservoir water before combining with other concentrates. Do not mix concentrates together directly. Shake the bottle well before use, and use dedicated clean measuring instruments — never introduce a measuring device into the container.
After mixing all nutrients and additives, adjust solution pH to your target range before feeding. For ongoing monitoring, check EC regularly and adjust CaMg dose based on runoff readings and visual plant response. Store sealed in original packaging between 45°F and 85°F.
The Athena Blended Line is a purpose-built two-part liquid system: no dry salts to weigh, no conversion math, consistent batch-to-batch. That simplicity is the point — an operator can run the same programme across multiple rooms or facilities and get repeatable results. CaMg preserves that repeatability by giving you a single, clearly-defined correction lever for Ca/Mg/Fe rather than forcing you to reformulate your base.
In a commercial SOG or vertical grow running coco or rockwool slabs on automated irrigation, CaMg is typically dialled in from propagation through late flower and removed or reduced only during a clean-water flush period. For soil-based programmes, supplementation needs are typically lower and should be calibrated against media buffering capacity.
HSC carries the Athena Blended Line nationally for licensed cannabis and hemp operators. If you're building out a nutrient programme or want to compare Blended versus Pro Line at your production scale, request a quote and we'll spec the right volume and mix for your facility.
| Product Name | Athena Blended CaMg |
| SKU | LQ-CM-5G |
| NPK | 2-0-0 |
| Total Nitrogen (N) | 2% (100% nitrate nitrogen) |
| Calcium (Ca) | 2.1% |
| Magnesium (Mg) | 1.1% (water soluble) |
| Iron (Fe) | 0.06% (chelated) |
| Container Size | 5 Gallon |
| Standard Application Rate | 2.5 mL per gallon of water, all growth stages |
| Application Range | 2–10 mL per gallon depending on cultivar and conditions |
| System Compatibility | Sediment-free; compatible with drip, Dosatron, recirculating, and fine dripper systems |
| Recommended Media | Coco coir, rockwool, soilless/peat, hydroponics, DWC; soil compatible at adjusted rates |
Not always. The Blended base formulas include calcium and magnesium at levels adequate for many cultivars and municipal water sources. CaMg becomes necessary when you're running RO water (which strips baseline Ca/Mg hardness), growing in inert media like coco or rockwool, or working with high-demand cultivars that outpace the base formula's Ca/Mg load during heavy vegetative or early-flower push.
Athena's documented standard rate is 2.5 mL per gallon across all stages. The label supports a range of 2–10 mL per gallon. In a full RO/coco build with no residual Ca/Mg in source water, starting at 2.5 mL/gal and adjusting based on runoff EC and plant response is the practical approach. Refer to the Athena Blended Feed Schedule for stage-by-stage guidance.
Yes. While it's formulated to integrate with Athena's two-part Blended system, the 2-0-0 NPK profile and chelated iron make it compatible with other liquid programmes. The nitrate-N carrier and chelated Fe maintain elemental balance without introducing phosphorus or potassium, so it doesn't distort the ratios in most base programmes.
The Pro Line uses Pro Core — a dry, water-soluble calcium/magnesium/micronutrient concentrate that growers weigh and dissolve into large-volume tanks. Blended CaMg is a pre-mixed liquid; no scale required, consistent concentration out of the bottle, and fully compatible with injector-based dosing systems. Both deliver Ca/Mg/Fe, but the form factor and cost-per-volume differ. The Blended Line is suited to operations that prioritize ease of handling and mixing speed; Pro Line suits high-volume facilities with mixing infrastructure and lower per-cycle cost targets.
Yes. Dilute CaMg into reservoir water before adding other concentrates — never mix concentrates directly together. After adding all components, check and adjust EC and pH before feeding. Shake the container well before measuring. Use clean, dedicated measuring instruments and do not insert anything into the container.
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