Phat Pro Fertiliser

Extra-strong plant food for aquariums with lots of plants that need fast growth and bright colours.

Phat Pro Fertiliser 250ml 500ml 2.7L

$21.95

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Formulated for High-Demand Planted Aquariums

PHAT PRO provides a balanced supply of nitrogen, phosphorus and potassium, complemented by essential trace elements including iron, magnesium and boron. The formulation is designed to support sustained plant growth, nutrient uptake and colour development in aquariums where nutrient demand exceeds what natural nutrient cycling can provide.

Developed for modern planted aquariums utilising CO₂ injection and moderate to high lighting, PHAT PRO helps maintain consistent nutrient availability as plant biomass and growth rates increase.

Application

Dose 5ml per 100L of aquarium water 3–7 times per week depending on plant density, lighting intensity and CO₂ availability.

As plant biomass increases, nutrient consumption will also increase. Regular monitoring of nitrate levels is recommended, with many high-energy planted aquariums performing well within a target range of approximately 5–10ppm NO₃.

Ideal For

PHAT PRO is particularly suited to Dutch-style aquariums, Nature Aquariums, heavily planted display tanks and systems dominated by fast-growing stem plants. It is equally effective for supporting demanding red species, dense carpeting plants and aquascapes where rapid nutrient uptake requires a more comprehensive fertilisation approach.

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FAQ

Q: What is PHATPRO Fertiliser used for?

A: PHATPRO Fertiliser is designed to provide essential nutrients that support healthy plant growth, vibrant colouration, and strong root development in planted aquariums.

Q: What nutrients does it contain?

A: It typically includes a balanced mix of macro and/or micro nutrients required for aquatic plants. Check the product label for exact composition.

Q: Is it suitable for all planted aquariums?

A: Yes, it can be used in a wide range of setups, from low-tech tanks to high-tech aquascapes with CO2 injection.

Q: How often should I dose PHATPRO Fertiliser?

A: Dosing frequency depends on plant density, lighting, and CO2 levels. Follow the recommended dosing instructions and adjust based on plant growth.

Q: Will it improve plant colour?

A: Yes, consistent dosing can enhance plant colour, especially reds and greens, when combined with proper lighting and CO2.

Q: Can I overdose fertiliser?

A: Yes, excessive dosing may lead to algae growth or nutrient imbalance. Always start with recommended amounts and adjust gradually.

Q: Is it safe for fish and shrimp?

A: Yes, when used as directed it is safe for aquarium livestock, including shrimp and sensitive species.

Q: Do I need CO2 to use this fertiliser?

A: No, it can be used in non-CO2 tanks, but optimal plant growth is usually achieved when combined with CO2 injection.

Q: Can beginners use this product?

A: Absolutely. It’s a simple way to ensure plants receive the nutrients they need without complex dosing systems.

Q: How long before I see results?

A: Many aquarists notice improved plant growth and colour within a few weeks of consistent use.

Q: Does this replace substrate nutrients?

A: It complements substrate nutrients by supplying nutrients directly to the water column for plant uptake.

Q: Can I use it with other plant supplements?

A: Yes, it can be used alongside root tabs, CO2 systems, and specialised additives as part of a complete planted tank setup.

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Fast and cheap
Over 100,000 happy aquariums
Dose planted tanks
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Supporting Growth Beyond Deficiency Prevention

PHAT PRO is designed around the principle that aquatic plants perform best when nutrients remain available before deficiencies emerge. Maintaining adequate nutrient reserves enables plants to allocate energy toward growth, pigmentation and recovery rather than simply maintaining essential biological processes.

Takayuki Fukada, widely regarded as one of the finest aquascapers in the world, relies on absolute precision behind the scenes.

Across his IAPLC-winning masterpiece, plant health, density, and long-term stability were driven by CO₂ injection paired with DALUA Phat Pro fertilisers—a system designed to deliver consistent uptake without excess or imbalance.

At this level, growth is not forced; it’s controlled. Every stem, colour transition, and texture you see is the result of balanced nutrition, predictable response, and professional-grade inputs trusted at the highest level of aquascaping.

Nutrient Availability as a Growth Limiting Factor

Most challenges encountered in high-energy planted aquariums can be traced back to an imbalance between light, carbon and nutrients. As lighting intensity and CO₂ availability increase, plant metabolism accelerates and nutrient demand rises accordingly. Without adequate replenishment, growth efficiency declines even when all other parameters remain optimal.

PHAT PRO

Precision Nutrition for High-Demand Planted Aquariums

Aquatic plants are capable of extraordinary growth when carbon, light and nutrients remain in balance. In modern planted aquariums, particularly those utilising pressurised CO₂ injection and high-intensity lighting, nutrient demand can increase dramatically. Under these conditions, nutrient availability often becomes the primary limiting factor governing plant growth, colouration and long-term stability.

PHAT PRO was developed to address the demands of high-energy planted aquariums by supplying a balanced combination of macronutrients and trace elements in a highly available liquid form. Rather than chasing individual deficiencies, the formulation is designed to support consistent nutrient availability across a broad range of aquatic plant species.

The result is stronger growth rates, improved shoot density, enhanced colour development and greater resilience following pruning and maintenance.

The Importance of Consistent Nutrient Availability

Aquatic plants continuously consume nitrogen, phosphorus, potassium and trace elements as they produce new tissue. In heavily planted aquariums, nutrient uptake can occur at a rate that exceeds replenishment through fish waste, substrate reserves and water changes alone.

As nutrient concentrations decline, growth often becomes less efficient. Stem plants may produce smaller internodes, carpeting species can lose density, and red plants frequently exhibit reduced pigmentation despite adequate lighting.

Providing a stable nutrient supply allows plants to maintain active growth and efficient metabolic function without experiencing repeated periods of nutrient limitation.

Designed for Modern Aquascaping

PHAT PRO is particularly well suited to aquariums containing dense plant biomass, fast-growing stem species and high-light aquascapes where nutrient demand fluctuates rapidly throughout the week.

Whether maintaining a Dutch-style aquarium, a competition-level Nature Aquarium or a densely planted display system, nutrient consistency remains one of the most important variables influencing long-term success.

By providing a complete and balanced nutrient source, PHAT PRO simplifies fertilisation while supporting predictable plant performance.

Supporting Growth Beyond Deficiency Prevention

Many fertilisers are formulated primarily to prevent visible deficiencies. While this approach may sustain basic plant health, it does not necessarily optimise growth potential.

This approach promotes stronger growth momentum, more consistent development and improved overall plant quality.

Recommended Application

Dose according to aquarium volume and plant density, adjusting as required based on nutrient consumption, growth rates and maintenance goals.

For best results, use alongside stable CO₂ injection, appropriate lighting intensity and regular water changes. Monitoring nitrate levels can provide valuable insight into nutrient consumption trends and assist with fine-tuning dosage requirements as plant biomass increases.

Customer Reviews

Overall rating: 4.6 / 5 from 28 reviews.

Customer photo review of Phat Pro Fertiliser

Plants love it

Tony C. 5/5 Verified September 3, 2026

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Phat Pro Fertiliser