Nexus Aquatics Fertilizer System
Custom aquarium plant nutrition designed for healthy growth, vibrant coloration, and shrimp-safe performance.
The Fertilizer Line
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Mockup ImageAll-In-One Blend
Complete Plant Nutrition
$24
All-In-One Blend combines essential macronutrients — nitrogen, phosphate and potassium — with chelated iron, magnesium and a full suite of trace micronutrients in one balanced solution. Instead of measuring multiple bottles, your aquarium gets everything it needs in a single pump. Each batch is made fresh to order and can be customized to your plant load.
Benefits
- Complete macro + micro nutrition in a single bottle
- Supports steady, lush growth across all common species
- Chelated iron deepens reds and greens
- Works in low-tech, no-CO₂ setups without algae pressure
- Zero copper — safe for Neocaridina and Caridina shrimp
- Simplifies your weekly routine to one step
Recommended Use
- Low-tech and medium-tech planted aquariums
- Shrimp tanks with live plants
- Community tanks where simplicity matters
- Anyone new to fertilizing a planted tank
Ingredients
- Purified Water
- Potassium Nitrate
- Monopotassium Phosphate
- Potassium Sulfate
- Magnesium Sulfate
- DTPA Iron
- Chelated Trace Minerals
Safety Information
- For aquarium use only.
- Keep out of reach of children.
- Avoid ingestion; wash hands after handling.
- Store away from direct sunlight.
- Shake well before use.
| Low-Tech / Low Plant Load | 1 mL per 10 gallons | 1–2× per week |
| Medium Plant Load | 1 mL per 10 gallons | 2–3× per week |
| High-Tech / Dense Planting | 1 mL per 10 gallons | 3–5× per week |
| Shrimp-Only Tank | 0.5 mL per 10 gallons | 1× per week |
| Nitrogen (N) | 2.0% |
| Phosphate (P2O5) | 0.5% |
| Potassium (K2O) | 5.0% |
| Iron (Fe) | 0.10% |
| Magnesium (Mg) | 0.4% |
| Trace Elements | 0.05% |
Fertilizer Bundles
Pair the formulas that work together and pay less than buying them separately.
Low-Tech Starter Bundle
One bottle for the water column and a tin of root tabs for heavy feeders. The simplest complete setup for crypts, swords and easy stems in low-light tanks.
High-Tech Aquascaper Bundle
Dose macros and micros independently on alternating days, with root tabs feeding the substrate. Built for dense carpets, red stems and fast growth.
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Fertilizer Calculator
Enter your tank details for a dose, a weekly total, and a schedule tailored to your setup.
Start at the low end for two weeks, then increase one dose per week until new growth is lush and algae stays in check.
Guidance only. Start low, observe plant response and algae, then adjust.
Plant Deficiency Guide
Browse or search by symptom, then open a card for the cause, the common mistake, and the fix.
Verify Your Product
Every Nexus bottle and tin carries a batch number printed on the label. Enter it below to view its production date and analysis. The lookup system goes live alongside our first production run.
Why Nexus Aquatics
Copper-Free
Zero copper in every formula — safe around sensitive ornamental shrimp and snails.
Shrimp-Safe
Tested and trusted in Caridina and Neocaridina colonies at label dose.
Made Fresh To Order
Small batches mixed when you order, never sitting on a warehouse shelf.
Customized To Your Plant Load
Tell us your tank and we adjust concentration to match your setup.
Premium Ingredients
Laboratory-grade salts and DTPA-chelated iron for stability and purity.
Made In Homestead, Florida
Mixed, bottled and labelled by hand in South Florida.
Frequently Asked Questions
What does All-In-One Blend do?
It delivers macronutrients and chelated micronutrients in a single bottle, so one pump covers everything a planted tank needs. It is the simplest place to start.
When should I use Macro Pro instead?
Choose Macro Pro when you want independent control of nitrogen, phosphorus and potassium — typically in CO₂-injected or heavily planted tanks. Pair it with Micro Pro on alternating days.
What is Micro Pro for?
Micro Pro supplies DTPA-chelated iron and the full trace suite responsible for colour and healthy new growth. Use it alongside a macro fertilizer or to correct yellow new growth.
Do I need Root Tabs?
If you keep swords, crypts, vallisneria or other heavy root feeders in sand or gravel, yes. Root Tabs feed the substrate directly without raising water-column nutrients.
Are Nexus fertilizers shrimp safe?
Yes. Every formula is completely copper-free and dosed as directed is safe for Neocaridina, Caridina, snails and fish.
How often should I dose?
One to two times per week for low-tech tanks, three to five for high-tech aquascapes. Use the calculator above for a schedule tailored to your volume and plant density.
How should I store my fertilizer?
Keep bottles sealed, cool and out of direct sunlight. Shake before each use. Root Tabs should stay sealed in a dry place.
How do I diagnose a plant deficiency?
Use the Plant Deficiency Guide on this page. Search your symptom, read the likely cause, and follow the recommended corrective action and product.