Alg-A-Mic by BioBizz — organic cold-pressed seaweed vitality stimulant, 1L bottle
Alg-A-Mic by BioBizz — organic cold-pressed seaweed vitality stimulant, 500ml bottle
Alg-A-Mic by BioBizz — organic cold-pressed seaweed vitality stimulant, 5L can

Alg-A-Mic by BioBizz — Organic Cold-Pressed Seaweed Vitality Stimulant

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Cold-pressed, 100% organic seaweed vitality stimulant for plants recovering from overfeeding, deficiencies, disease or temperature swings. Low NPK, so it cannot be overdosed. 1–4ml per litre, or 1–2ml as a foliar.


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Alg-A-Mic is BioBizz's vitality stimulator, made from a high-grade, 100% organic seaweed concentrate that is extracted by cold pressing rather than with chemical solvents. Its job is recovery and resilience: BioBizz positions it as the bottle that comes to the rescue when plants have suffered from overfeeding, deficiencies, diseases or temperature fluctuations, and it keeps leaves green by stimulating chlorophyll absorption. The NPK level is deliberately low, which is why BioBizz says it is impossible to overdose, and why it slots on top of any feed without rebalancing anything. It goes into every substrate through veg and flower at 1–4ml per litre, and doubles as a foliar spray at 1–2ml per litre up to the second week of flowering. Available in 500ml, 1L and 5L.

Cold-Pressed SeaweedA high-grade, 100% organic seaweed concentrate extracted through cold pressing rather than chemical solvents, so the full spectrum of natural nutrition stays intact.
The Recovery BottleComes to the rescue after overfeeding, deficiencies, disease or temperature fluctuations. Stress-free plants, as BioBizz puts it, generally produce larger fruits.
Keeps Leaves GreenEnsures green leaves by stimulating chlorophyll absorption. Lush foliage is the engine the whole plant runs on.
Impossible To OverdoseA low level of NPK means BioBizz rates it impossible to overdose. Run it on top of any feed without rebalancing anything.
Root Feed Or Foliar1–4ml per litre in the watering can, or 1–2ml per litre as a foliar spray one to three times a week until the second week of flowering.
Certified Organic InputEcocert attested, Control Union certified as an organic input under the EU regulation and the US NOP, plus Clean Green and EnvirOganic. Vegan icon on the BioBizz AU schedule.

Specifications

Product: Alg-A-Mic vitality stimulator by BioBizz
Sizes: 500ml, 1L, 5L (BioBizz also makes 250ml, 10L and 20L)
Composition: High-grade, 100% organic seaweed concentrate, cold pressed (BioBizz). Contains a low level of NPK; percentages not published on the 2026 data sheet
Type: Organic vitality stimulator / revitaliser
Dose rate, root feed: 1–4ml per litre of water, on every substrate during the growing and flowering period
Dose rate, foliar: 1–2ml per litre of water, 1–3 times a week until the second week of flowering (BioBizz AU schedule)
AU schedule, both charts (ml per litre): Propagation – · Veg 2 · Flower wk1–8: 2, 2, 3, 3, 4, 4, 3, 2 · wk9 plain water · wk10 harvest
What it does: Helps plants recover from overfeeding, deficiencies, diseases or temperature fluctuations; ensures green leaves by stimulating chlorophyll absorption (BioBizz)
Overdose risk: BioBizz: low NPK level makes it impossible to overdose
Substrates: Every substrate (BioBizz). On coco: adjust pH and use an enzyme product
Application: Regular watering and foliar spray, indoor and outdoor (BioBizz). Hydroponics is not listed as an application for Alg-A-Mic
Makes: At 1–4ml/L: 500ml makes 125–500 litres; 1L makes 250–1,000 litres; 5L makes 1,250–5,000 litres
Certifications: Ecocert attestation; Control Union certified Organic EU Input; Control Union certified NOP (US National Organic Program) Input; Clean Green certification; EnvirOganic certification — as listed by BioBizz for this product
Vegan: Carries the BioBizz vegan icon on the AU nutrient schedule
Barcode (EAN): 500ml 8718403231250 · 1L 8718403231236 · 5L 8718403231274
Safety: Keep out of the reach of children. Do not swallow. Use following the instructions (BioBizz data sheet)
Manufacturer: BioBizz Worldwide Organics (biobizz.com). Distributed in Australia by Stealth Garden

Grower's Tip

  • Keep a bottle for emergencies even if you do not run it every week. Overfed, cold-snapped or sulking after a transplant, Alg-A-Mic is the bottle BioBizz reaches for, and the low NPK means you are not piling more feed onto a stressed plant.
  • Foliar with the lights off. Spray at the end of the dark period or just before lights-on, and get the undersides of the leaves where the stomata are. Wet leaves under full light is how you burn them.
  • Stop foliar at flowering week 2. That is BioBizz's cut-off, and it is good practice anyway: wet flowers invite mould, and nobody wants seaweed on the harvest.
  • It is not on the chart in propagation. The AU schedule starts Alg-A-Mic in veg at 2ml per litre. If cuttings are stressed, a foliar at 1–2ml per litre is the BioBizz-sanctioned route.
  • Clean the sprayer. Seaweed concentrate clogs a nozzle if it dries in it. Rinse the sprayer and run clean water through it after every use.
  • Dose by ml, not EC. A low-NPK seaweed extract will not move an EC meter. 2ml per litre is 20ml in a 10-litre can; 1ml per litre is 1ml in a 1-litre spray bottle.
  • Shake, measure, stir. It settles. Shake before you pour, and mix the can or the sprayer through.
  • Impossible to overdose is not an invitation. BioBizz's advice across the range is that it is always better to be modest than to add more. Follow the chart; it climbs to 4ml per litre in flowering weeks 5–6 and that is plenty.

How To Use It

1Start in veg at 2ml per litre. Alg-A-Mic joins the feed in veg on the AU chart, after propagation.
2Fill the can, pH if you are on coco. BioBizz calls pH adjustment and an enzyme product essential on coco. In soil, fill and go.
3Shake the bottle. Seaweed concentrate settles. Shake before every pour.
4Measure your dose. 2ml per litre is 20ml for a 10-litre can. Climb the chart to 3ml in flowering weeks 3–4 and 4ml in weeks 5–6, then ease back to 2ml by week 8.
5Add it to the same can as the feed and stir through. It sits on top of Bio-Grow and Bio-Bloom without changing anything else.
6Optional: foliar spray at 1–2ml per litre. One to three times a week, lights off, undersides of the leaves, until the second week of flowering. Then stop.
7Flush and harvest. Plain water only in week 9. Harvest in week 10.

Pairs Well With

Frequently Asked Questions

What is BioBizz Alg-A-Mic?

Alg-A-Mic is BioBizz's vitality stimulator, made from a high-grade, 100% organic seaweed concentrate extracted through cold pressing rather than chemical solvents. BioBizz describes it as the product that comes to the rescue when plants have suffered from overfeeding, deficiencies, diseases or temperature fluctuations, and says it ensures green leaves by stimulating chlorophyll absorption.

What is the Alg-A-Mic dose rate?

1–4ml per litre of water in the feed, on every substrate through the growing and flowering period. The Australian schedule runs 2ml per litre in veg, then 2, 2, 3, 3, 4, 4, 3, 2ml per litre across flowering weeks 1–8, with plain water in week 9. There is no propagation dose on the chart.

Can I use Alg-A-Mic as a foliar spray?

Yes. The BioBizz AU schedule says Alg-A-Mic can also be applied as a foliar one to three times a week until the second week of flowering, at 1–2ml per litre of water. Spray with the lights off and stop at flowering week 2, as BioBizz instructs.

Is it really impossible to overdose Alg-A-Mic?

That is BioBizz's claim, and the reasoning is that it contains only a low level of NPK, so it does not push the feed out of balance the way a fertiliser would. It is still a concentrate, so follow the chart rather than treating the claim as a licence; BioBizz's own advice is that it is always better to be modest than to add more.

When should I reach for Alg-A-Mic?

Two situations. As a scheduled part of the BioBizz feed from veg to the end of flower, and as the recovery bottle when a plant has been overfed, is showing a deficiency, has had a disease scare or has been through a temperature swing. The low NPK means you can add it to a stressed plant without stacking more feed on top of the problem.

Is Alg-A-Mic organic?

BioBizz lists Alg-A-Mic with an Ecocert attestation and Control Union certification as an organic input under both the EU regulation and the US National Organic Program, plus Clean Green and EnvirOganic. Those are overseas input certifications rather than an Australian organic certification. It carries the BioBizz vegan icon on the AU schedule.

Can I use Alg-A-Mic in coco or hydroponics?

Coco, yes: BioBizz says every substrate, with its standard coco condition of adjusting pH and using an enzyme product. Hydroponics is not listed by BioBizz as an application for Alg-A-Mic, so keep it to soil and coco, or use it as a foliar on hydro plants instead.

How is Alg-A-Mic different from Root-Juice?

Both contain seaweed, but Root-Juice pairs it with humic acid and is aimed at the roots in propagation and veg, finishing by week 3 of flower. Alg-A-Mic is pure cold-pressed seaweed concentrate aimed at the whole plant's vitality from veg to the end of flower. On the BioBizz chart they overlap in veg and hand over in early flower.

Will Alg-A-Mic change my EC or pH?

Barely, on EC: it is a low-NPK organic seaweed extract, so the meter will not tell you much. Dose by volume. On pH, BioBizz says adjustment is essential on coco; in soil no target is given.

Which size should I buy?

At 1–4ml per litre the 500ml makes 125–500 litres, the 1L makes 250–1,000 litres and the 5L makes 1,250–5,000 litres. If you are mostly using it as a foliar at 1–2ml per litre, a 500ml lasts a long time; if it is in every feed from veg to harvest in a full room, go for the 1L or 5L.

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Less Stress. More Harvest.

Cold-pressed organic seaweed. 1–4ml per litre in the feed, or 1–2ml as a foliar.

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