Aptus Base
Aptus Base is a dual-stage base nutrient built for high-demand cultivars, and it covers the whole NPK requirement from the beginning of vegetative growth through to the end of the fruiting and flowering phase. Most growers meet it as the mineral core of an Aptus feed: one concentrated bottle covering both grow and bloom rather than a separate formula for each, on a dilution rate that barely changes across the cycle. The real point of difference is what has been deliberately left out. Base carries no chlorides and no ballast salts, the inert load that contaminates a growing substrate without feeding anything, so what goes into the medium is nutrition the plant can actually use.
It is a 100% mineral-based fertiliser, and it supplies the essential macro and micro elements a fast-growing crop needs: nitrogen for chlorophyll and the plant's amino acids, phosphorus for root development and flower formation, potassium as the core of ATP and the controller of respiration, and magnesium sitting at the centre of the chlorophyll molecule itself. Behind those come the trace elements - boron for healthy cell wall formation, molybdenum to convert inorganic phosphorus into organic forms inside the plant, iron for chlorophyll and critical enzyme formation, manganese for root growth and resistance to root zone pathogens, zinc for the auxins that regulate growth, and copper to activate enzymatic reactions. One element is missing on purpose. Base contains zero calcium, which makes it a Part-B, paired with a Part-A that brings the calcium and magnesium: either Massboost, the organo-mineral option, or Mineral-Calmag, the clean mineral one. The formula itself was updated after two years of research and development to help balance the cation exchange effect seen through weeks 3 to 5 of flower; the earlier version could appear blue or green depending on light, temperature and age, with no difference in how it performed.
Because there is no chloride or ballast load in the bottle, the EC of a mixed Base solution reflects nutrient the plant can take up, and that is exactly why its recommended EC sits much lower than most NPK formulas. Read it against the Aptus feeding programme rather than the number you are used to from another brand, or a correct feed will look weak. It suits every major medium, soil, coco, perlite, hydroton, peat moss and rockwool included, as well as hydroponic systems, and goes in as a root drench. Combined with Mineral-Calmag it holds for a minimum of 14 days in a reservoir or nutrient tank and leaves fertigation lines clear of blockages and salt residue, though recirculating systems still need topping up daily or every second day with further Mineral-Calmag and Base to replace what the plants have taken out. Choosing the Part-A is the decision worth making before you order: Massboost brings an organo-mineral input alongside the calcium and magnesium, while Mineral-Calmag keeps the entire feed mineral and is the pairing used in deep water culture, recirculating hydroponics and fertigation.
NOTE: Base contains zero calcium and must be used with either Massboost or Mineral-Calmag. It is a concentrated fertiliser that may damage fertility or the unborn child, causes severe skin burns and causes serious eye irritation. Wear gloves and eye protection, and always add it to pre-dispensed water rather than adding water to the product.
The only NPK you need from first leaves right through to harvest!
Cleaner Root Zone
No chlorides or ballast salts building up
True Feed Readings
EC reflects real nutrient density, not filler
Clog Free Feeding
Mixes stable, leaves no salt residue behind
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Aptus Base
Key Highlights
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Key Highlights
- Dual-stage NPK nutrient: one bottle covers vegetative growth and flowering
- 100% mineral-based, with no chlorides or ballast salts
- Supplies nitrogen, phosphorus, potassium and magnesium plus boron, molybdenum, iron, manganese, zinc and copper
- Zero calcium by design: run it with Massboost or Mineral-Calmag as the Part-A
- Root drench feeding across soil, coco, perlite, hydroton, peat moss and rockwool
- Suited to deep water culture, recirculating hydroponics and fertigation systems
Directions for Use
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Directions for Use
Dilution Rate
- All growing mediums: 1 ml - 2 ml per 1 L
- Seedlings: 1 ml - 1.5 ml per 1 L
Application
- Add Base to the reservoir at every feed through both the vegetative and flowering periods of growth.
- Always add the product to pre-dispensed water rather than adding water to the product, then mix well.
- Combine Base with either Massboost or Mineral-Calmag at every feed, as Base contains no calcium.
- From seed, dose at 1 ml per 1 L alongside Massboost or Mineral-Calmag from the first signs of leaves, increasing to 1.5 ml per 1 L as plants establish.
- Check pH once the solution is mixed. The recommended EC of Base is much lower than most NPK formulas, so consult the Aptus feeding programme rather than dosing to a familiar EC.
- Under high intensity HID or LED lighting it is safe to increase Base by 10 - 30% above the recommended dose to correct NPK deficiencies.
- In recirculating hydroponic systems, top up daily or every second day with additional Mineral-Calmag and Base to replace the minerals the plants consume.
Safety
DANGER: May damage fertility or the unborn child. Causes severe skin burns. Causes serious eye irritation.
Wear protective gloves, eye and face protection and suitable protective clothing when handling, and ensure adequate ventilation.
Keep the container tightly closed in its original packaging, away from direct heat, light and ferrous metals.
Store away from strong bases, reducing agents and oxidising agents.
If skin or eyes are contacted: rinse thoroughly with running water for several minutes. If irritation persists, seek medical advice.
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Shipping & Returns
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Shipping & Returns
Check delivery options for the currently selected item and quantity.
Estimate is for this item and quantity only. Final whole-order freight is confirmed at checkout.
We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.
To be eligible for a return, your item must be in the same condition that you received it, unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.
To start a return, you can contact us at info@hydrooasis.com.au
If your return is accepted, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.
You can always contact us for any return question at info@hydrooasis.com.au.
Size: 1 L
