Vitalink Hydro MAX Grow A&B Soft Water — Two-Part Hydroponic Base Nutrient for UK Soft Water Areas
Best for: First-time hydro growers and experienced cultivators on soft water who want a simpler, reliable two-part system
Our thoughts
This is proper thinking for soft water hydro. Most growers don't realise soft water needs a different nutrient approach — Vitalink got this right. The EDDHA iron keeps everything available across a wider pH range, and the fulvic acid bump means your plants actually use what you're feeding them. Simple two-part system, made in Coventry, formulated specifically for British water. That's the kind of detail that saves headaches.
Vitalink Hydro MAX Grow A&B is a highly-concentrated two-part mineral nutrient designed specifically for soft water hydroponic systems during the vegetative growth stage. This isn't generic nutrient adapted for UK growers — it's built from the ground up for British water chemistry, which makes a real difference when you're running hydro.
The MAX formulation steps up from the original with two key additions: EDDHA-chelated iron, which stays available across a wider pH range (no more pale growth creeping in), and fulvic acid, which acts as a nutrient uptake catalyst so plants make the best use of what you're actually feeding them. Everything balances out — you're not chasing corrections mid-cycle.
How it compares
Vitalink Hydro MAX Grow sits in the professional two-part category — simpler than three-part systems, more targeted than one-part.
- Two-part format means fewer bottles, simpler mixing, lower cost than General Hydroponics Flora Series
- Soft water formulation built for UK supply — not a hard water nutrient adapted downwards
- EDDHA iron and fulvic acid included as standard, addressing uptake efficiency from day one
- Stable in recirculating systems (DWC, NFT, flood & drain) and run-to-waste setups
- More accessible than premium three-part systems without cutting corners on micronutrient breadth
If you've been using one-part or struggling with a three-part system, this is where most growers graduate to.
Usage guidance
Seedlings and young plants
Mix at 1–2 ml/L of each A and B solution. Soft water benefits from lower starting doses — let the plant tell you if it needs more.
Mature vegetative plants
Increase to 3–4 ml/L of each part. Keep the ratio equal — A and B work as a pair.
Mixing protocol
Always add part A to your water first, mix thoroughly, then add part B. Never mix A and B together in concentrate form.
pH and monitoring
Target 5.8–6.5 pH range. Soft water systems reward consistency — stable pH and EC matter more than chasing strength.
Soft water top-up
If you're in a very soft water area, Vitalink recommend half-strength CalMag supplement (0.5 ml/L) during the growth stage to prevent calcium and magnesium drift.
Switching to flowering
Use Hydro MAX Grow from transplant through the first week of flowering, then switch to Hydro MAX Bloom when plants show clear flowering initiation.
System compatibility
Works across all hydroponic setups — deep water culture, NFT, flood & drain, aeroponics, and run-to-waste. The formula is stable enough for recirculating systems without constant pH chasing.
Technical specifications
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Format: Two-part A and B mineral concentrate
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Application: Vegetative growth stage only
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Formulation: Contains EDDHA-chelated iron (available across wider pH range), fulvic acid (nutrient uptake catalyst), and full spectrum chelated micronutrients
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Water type: Soft water formulation (hard water variant also available)
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Dosage — seedlings: 1–2 ml/L each of A and B
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Dosage — mature plants: 3–4 ml/L each of A and B
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Target pH: 5.8–6.5
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Recommended pH adjustment: Half-strength CalMag (0.5 ml/L) in very soft water areas during growth
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Stability: Stable in both recirculating and run-to-waste systems
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Packaging options: 1L, 5L, and 10L bottles
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Origin: Formulated and manufactured in Coventry, England
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Compatibility: Works with all inert media (clay pebbles, perlite, rockwool, mapito) and does not affect taste or quality of edible crops
Who this is for
- First-time hydro growers on soft water wanting a simpler system than three-part nutrients
- Experienced growers switching from soil or growing media who want the control of hydro without overcomplicating it
- Lettuce and leafy green cultivators — this system is proven for high-nitrogen crops with quick turnaround
- Anyone running deep water culture, NFT, or flood & drain who needs stability without constant correction
- Budget-conscious growers who want professional-grade results without premium pricing
- UK growers who've had iron deficiency issues with generic nutrients — the EDDHA formulation solves this cleanly
Our take
This is a properly thought-out nutrient for UK soft water hydro. It's not a global formula downgraded for the UK market — it's built specifically for British water chemistry, which saves you headaches from day one. Two parts instead of three means less mixing, lower cost, and actually more micronutrient breadth than most single-bottle systems.
The EDDHA iron and fulvic acid aren't gimmicks — they're practical solutions to the exact problems soft water hydro growers hit. Use it with consistency, keep your pH steady, and it feeds plants cleanly through the veg stage without constant tinkering.
If you're setting up a hydro system on soft water or upgrading from what you're currently using, this is worth picking up. Does exactly what it should, day in, day out. Good time to buy while clearance stock lasts.
