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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All-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
- 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.
All-In-One 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.
Why Nexus Aquatics
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.
How Nexus Compares (Liquid Fertilizers)Cómo se compara Nexus (Fertilizantes líquidos)
Swipe sideways to see every product →Desliza hacia un lado para ver todos los productos →
| FeatureCaracterística | Nexus AIONexus AIO | Nexus Macro ProNexus Macro Pro | Nexus Micro ProNexus Micro Pro | Thrive+Thrive+ | ThriveThrive | Easy GreenEasy Green |
|---|---|---|---|---|---|---|
| Nutrient profilePerfil de nutrientes | Macros + MicrosMacros + Micros | Macros (N·P·K·Mg)Macros (N·P·K·Mg) | Micros + Chelated IronMicros + Hierro Quelatado | Macros + MicrosMacros + Micros | Macros + MicrosMacros + Micros | Macros + MicrosMacros + Micros |
| Chelated ironHierro quelatado | Yes (DTPA + CSM+B)Sí (DTPA + CSM+B) | No ironSin hierro | Yes (DTPA + CSM+B)Sí (DTPA + CSM+B) | Yes (chelated Fe)Sí (Fe quelatado) | Yes (chelated Fe)Sí (Fe quelatado) | Yes (iron present)Sí (contiene hierro) |
| Shrimp safetySeguridad para gambas | Shrimp-Safe (trace copper from CSM+B is extremely low and chelated)Seguro para gambas (el cobre traza de CSM+B es extremadamente bajo y quelatado) | Copper-Free & Shrimp-SafeSin cobre y seguro para gambas | Shrimp-Safe (trace copper from CSM+B is extremely low and chelated)Seguro para gambas (el cobre traza de CSM+B es extremadamente bajo y quelatado) | Generally shrimp-safe when dosed as directed (contains copper)Generalmente seguro para gambas al dosificar según las indicaciones (contiene cobre) | Generally shrimp-safe when dosed as directed (contains copper)Generalmente seguro para gambas al dosificar según las indicaciones (contiene cobre) | Safe for fish, shrimp, and snailsSeguro para peces, gambas y caracoles |
| Dosing frequencyFrecuencia de dosificación | 1–5× / week1–5× / semana | 3× / week or daily for CO₂ tanks3× / semana o diario en acuarios con CO₂ | 3× / week or daily3× / semana o diario | 1–3× / week1–3× / semana | 1–3× / week1–3× / semana | 1–3× / week1–3× / semana |
| ConcentrationConcentración | HighAlta | HighAlta | HighAlta | Very HighMuy alta | HighAlta | MediumMedia |
| High-Tech suitableApto para alta tecnología | Yes (CO₂ optimized)Sí (optimizado para CO₂) | Yes (with heavier dosing)Sí (con dosificación más intensa) | ||||
| Low-Tech suitableApto para baja tecnología | Yes (reduced dosing)Sí (dosificación reducida) | Better for high-techMejor para alta tecnología | ||||
| Price per bottle (500 mL)Precio por botella (500 mL) | $24$24 | $20$20 | $22$22 | $29.99$29.99 | $24.99$24.99 | $24.99$24.99 |
| Cost per mLCosto por mL | $0.048$0.048 | $0.040$0.040 | $0.044$0.044 | $0.060$0.060 | $0.050$0.050 | $0.050$0.050 |
| Cost per 100 gallons dosedCosto por 100 galones dosificados | $0.48$0.48 | $0.60$0.60 | $0.44$0.44 | $1.20$1.20 | $1.00$1.00 | $0.50$0.50 |
Values based on publicly listed product data and standard dosing schedules.Valores basados en datos de producto publicados y programas de dosificación estándar.
Root Zone (Root Tab Comparison)Zona radicular (Comparación de tabletas)
Swipe sideways to see every product →Desliza hacia un lado para ver todos los productos →
| FeatureCaracterística | Nexus Root TabsNexus Root Tabs | Seachem Flourish TabsSeachem Flourish Tabs | API Root TabsAPI Root Tabs |
|---|---|---|---|
| Nutrient profilePerfil de nutrientes | N·P·K + Micros + Chelated IronN·P·K + Micros + Hierro Quelatado | Micros + Trace (very low NPK; no added nitrate/phosphate)Micros + Trazas (NPK muy bajo; sin nitrato/fosfato añadido) | Iron + Potassium + Carbon (no full NPK analysis listed)Hierro + Potasio + Carbono (sin análisis NPK completo publicado) |
| Iron contentContenido de hierro | HighAlto | ModerateModerado | ModerateModerado |
| Clay binderAglutinante de arcilla | Iron-Rich LateriteLaterita rica en hierro | ||
| Organic matterMateria orgánica | MinimalMínima | Yes (vitamins + amino acids)Sí (vitaminas + aminoácidos) | Not specifiedNo especificado |
| LongevityDuración | 8–10 weeks8–10 semanas | 12–16 weeks12–16 semanas | ~8 weeks (monthly replacement recommended)~8 semanas (se recomienda reemplazo mensual) |
| Breakdown rateVelocidad de descomposición | Slow, steadyLenta y constante | SlowLenta | FasterMás rápida |
| Shrimp safetySeguridad para gambas | Shrimp-Safe (trace copper from CSM+B is extremely low and chelated)Seguro para gambas (el cobre traza de CSM+B es extremadamente bajo y quelatado) | Generally shrimp-safe when used as directedGeneralmente seguro para gambas al usarse según las indicaciones | Generally shrimp-safe when used as directedGeneralmente seguro para gambas al usarse según las indicaciones |
| Price per tinPrecio por envase | $18 (12 tabs)$18 (12 tabletas) | $8.49 (10 tabs)$8.49 (10 tabletas) | $7.99 (10 tabs)$7.99 (10 tabletas) |
| Cost per tabCosto por tableta | $1.50$1.50 | $0.85$0.85 | $0.80$0.80 |
| Applicator includedAplicador incluido | |||
| Cost per 100 gallons substrateCosto por sustrato de 100 galones | $30.00$30.00 | $17.00$17.00 | $16.00$16.00 |
Nexus Root Tabs use a laterite binder for slow release. Flourish and API data based on manufacturer-listed ingredients and usage guidelines.Las Nexus Root Tabs usan un aglutinante de laterita para liberación lenta. Los datos de Flourish y API se basan en ingredientes y pautas de uso publicados por los fabricantes.
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.
Can I use Nexus fertilizers with shrimp and snails?
Many keepers do, but invertebrates vary in sensitivity. Start below the recommended dose, increase slowly, and watch your livestock closely. We do not make shrimp-safe or copper-free claims.
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.