What is Flourish Phosphorus used for?

Flourish Phosphorus is primarily used as a nutrient supplement for aquatic plants. It supplies essential phosphorus, which is crucial for the energy transfer within plants and helps promote healthy root development. Phosphorus deficiency in aquatic ecosystems can lead to stunted growth and poor overall plant health. By using Flourish Phosphorus, aquarists can ensure their aquatic plants thrive, leading to a vibrant and well-balanced aquatic environment.

How do I use Flourish Phosphorus in my aquarium?

To use Flourish Phosphorus effectively, first determine your current phosphorus levels and the needs of your specific aquatic plants. It is typically recommended to add a small dose to ensure the phosphorus levels in your aquarium are optimized for plant growth. Start with a concentrated drop and gradually increase based on the plants' response. Regular dosing may encourage lush growth and vibrant colors while preventing nutrient deficiencies in your aquatic landscape.

Is Flourish Phosphorus safe for all types of aquariums?

Yes, Flourish Phosphorus is safe for use in all freshwater aquariums. It is designed to provide essential nutrients without harming fish or other aquatic life. However, it is crucial to monitor your water parameters regularly, as excessive phosphorus levels can lead to algae blooms and can disrupt the balance of your aquarium. Maintaining proper nutrient levels ensures a harmonious ecosystem, benefiting both plants and aquatic creatures.

Can Flourish Phosphorus be used with other fertilizers?

Flourish Phosphorus can be used in conjunction with other fertilizers, such as Flourish Comprehensive Supplement or Flourish Iron, to provide a well-rounded nutrient profile for your plants. When combining fertilizers, it's important to follow the recommended guidelines for each product to avoid over-fertilization. This synergistic approach helps create an optimal growing environment, promoting vigorous growth and overall health of your aquatic plants.

What are the signs of phosphorus deficiency in aquatic plants?

Signs of phosphorus deficiency in aquatic plants include slow growth, stunted leaves, and yellowing of new growth. You might also observe dark or discolored tones in the leaves that may eventually lead to leaf drop or poor flowering. If you suspect a deficiency, testing your water parameters can help confirm it. By addressing phosphorus levels with Flourish Phosphorus, you can quickly revitalize your plants and restore their natural beauty.

How often should I add Flourish Phosphorus to my aquarium?

The frequency of adding Flourish Phosphorus depends on the nutrient demands of your aquatic plants and your aquarium's specific conditions. It's generally suggested to test your water weekly and adjust the dosage accordingly. For heavily planted tanks or those experiencing fast growth, you may need to dose more frequently. Regular observation of your plants' health will guide you in establishing an appropriate dosing schedule.

Can Flourish Phosphorus harm my fish or invertebrates?

Flourish Phosphorus is formulated to be safe for both fish and invertebrates when used as directed. It provides essential nutrients without introducing harmful chemicals. Ensuring the product’s proper dosage minimizes the risk of adverse effects while promoting a balanced aquatic environment. As good practice, introduce any new supplement gradually and monitor your aquatic life for unusual behavior after application.

What is the best way to store Flourish Phosphorus?

To maintain its efficacy, store Flourish Phosphorus in a cool, dry place away from direct sunlight. Keeping the bottle tightly sealed after each use will protect it from contamination and degradation. Storing it in a consistent temperature environment prevents any possible chemical reactions. Proper storage prolongs the product's lifespan, ensuring that you can rely on its nutritional benefits for your aquatic plants when needed.

What aquatic plants benefit the most from Flourish Phosphorus?

Fast-growing aquatic plants such as Vallisneria, Echinodorus, and various species of stem plants significantly benefit from Flourish Phosphorus. These plants require high nutrient levels to sustain their rapid growth and vibrant coloration. By providing adequate phosphorus levels, these plants will flourish, contributing to a healthier and more visually appealing aquarium. Tailoring your nutrient additions to specific plant needs enhances your overall aquatic landscape.

Where can I buy Flourish Phosphorus, 100 mL / 3.4 fl. oz?

You can buy Flourish Phosphorus, 100 mL / 3.4 fl. oz from Ubuy in Australia. Ubuy offers a broad selection of aquarium products, including this essential nutrient supplement, ensuring you have access to quality aquatic care solutions. Check their website for availability and additional product details to enhance your aquatic gardening experience.

How to Shop Flourish Phosphorus Plant Supplement 500ml Online From Ubuy?

It’s easy to shop Flourish Phosphorus Plant Supplement 500ml online from Ubuy. You just have to search for the product, choose your shipping method while checking out and get it delivered to your location.

Is Flourish Phosphorus Plant Supplement 500ml Available to Shop Online in Australia?

Yes, at Ubuy Australia this product is available for you to shop at a reasonable price. The Flourish Phosphorus Plant Supplement 500ml is not available locally but you can trust us with our express shipping services.

How Long Does It Take to Get Product After Placing the Order?

The delivery time of your ordered product varies as per what you've ordered and the shipping method that you've chosen. The estimated delivery time is mentioned during the checkout process, so be carefree while shopping.

Seachem

Flourish Phosphorus Plant Supplement 500ml

Flourish Phosphorusª takes the guess work out phosphate dosing, allowing you to enhance plant growth without the risk of overdosing nitrates.

Seachem

Item #: 83719597

Flourish Phosphorus Plant Supplement 500ml

85% of respondents would recommend this to a friend

Item #: 83719597

AUD 44

Price Details

Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )

^{*All items will import from US}

Availability : In stock

Imported from USA store

QTY:

Order now and get it around Tuesday, November 03

Secured transaction

Our Top Logistics Partners

Flourish Phosphorusª takes the guess work out phosphate dosing, allowing you to enhance plant growth without the risk of overdosing nitrates.

100 mL, 250 mL, 500 mL, 2 L, 4 L

4 L / 1 fl. gal.

100 mL / 3.4 fl. oz.

U-Care Warranty:

None

Select a Plan

Buy Now Pay Later

Fast
Shipping

Free
Return^*

Secure Packaging

100% Original Products

PCI DSS Compliance

ISO 27001 Certified

Note: Step Down Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.

What Stands Out

Enhanced Growth

Flourish Phosphorus promotes robust root development and flowering in plants, ensuring they receive essential nutrients for optimal growth and vitality.

User-Friendly

This liquid formulation is easy to apply, making it accessible for both novice and experienced gardeners looking to improve their plant health effortlessly.

High Purity

With superior-quality ingredients, Flourish Phosphorus guarantees maximum availability and absorption by plants, setting it apart from competing phosphorus supplements.

Product Details

Brand Name	Seachem
Unit Count	16.91 Fluid Ounces
Manufacturer	Seachem
UPC	000116019309
Number of Items	1
Manufacturer Part Number	5095
Liquid Volume	500 ml
Item Weight	0.65 kg
Item Form	Liquid
Target Species	Shrimp
Product Dimensions	6.3 x 6.3 x 6.3 inches (16 x 16 x 16 cm); 1.43 pounds (650 grams)
Brand	Seachem

Who Should Buy?

Aquarium Plant Lovers
Ideal for hobbyists focused on promoting healthy aquatic plant growth in freshwater or saltwater tanks.
Garden Enthusiasts
Beneficial for gardeners seeking to enhance phosphorus levels for flowering plants and fruits in their gardens.
Hydroponic Growers
Perfect for hydroponic systems requiring precise nutrient balance to support plant health and fruit development.

Fish-Only Aquariums
Not suitable for aquariums focused solely on fish, as excess phosphorus can harm aquatic life.

Product Description

Dietary Supplement Disclaimer

Statements regarding dietary supplements have not been evaluated by the Food and Drug Administration and are not intended to diagnose, treat, cure, or prevent any disease or health condition.

Have any Query? Chat with us

Customer Questions & Answers

Question: How to Shop Flourish Phosphorus Plant Supplement 500ml Online From Ubuy?

Answer: It’s easy to shop Flourish Phosphorus Plant Supplement 500ml online from Ubuy. You just have to search for the product, choose your shipping method while checking out and get it delivered to your location.
Question: Is Flourish Phosphorus Plant Supplement 500ml Available to Shop Online in Australia?

Answer: Yes, at Ubuy Australia this product is available for you to shop at a reasonable price. The Flourish Phosphorus Plant Supplement 500ml is not available locally but you can trust us with our express shipping services.
Question: How Long Does It Take to Get Product After Placing the Order?

Answer: The delivery time of your ordered product varies as per what you've ordered and the shipping method that you've chosen. The estimated delivery time is mentioned during the checkout process, so be carefree while shopping.

Seachem Fertilizers & Plant Food Editorial Review

Flourish Phosphorus Plant Supplement 500ml is a specialized nutrient designed by Seachem to enhance the growth of aquatic plants in your aquarium. This liquid supplement, which is shrimp safe, effectively boosts phosphorus levels, encouraging healthier plant development without clouding the water, as confirmed by users who have noted significant improvements such as increased growth and thriving aquatic life. While some customers felt that the size was smaller than expected for the price, overall, this product meets the demands for a vibrant, lush underwater landscape, proving to be an essential addition for serious hobbyists focused on plant care.

Customer Reviews & Ratings

4.6

95 customers ratings

5 Star

80%
4 Star

11%
3 Star

3%
2 Star

0%
1 Star

6%

Review this product

Share your thoughts with other customers

Pros

Enhances plant growth effectively
Completely shrimp safe for aquatic environments
Does not cloud water during use
High-quality formulation by Seachem
Suitable for various aquatic plants

Cons

Bottle size may be smaller than expected for some users

Platform Trust & Buyer Confidence

4.1/5 325 reviews

Read reviews

Eddie

Verified buyer

“Purchased from Europe and arrived within 10 days. Very happy with the service”

30 August 2026 · via Trustpilot

David

Verified buyer

“Order arrived quickly and as ordered. Recommend”

10 September 2026 · via Trustpilot

Matt

Verified buyer

“Very happy customer. Excellent communication with speedy delivery. My daughter is loving her new bike which was delivered too Australia all the way from the states, no problems at all. Highly recommended.”

02 October 2026 · via Trustpilot

Customer

Verified buyer

“Thank you a very good product works perfectly. Thank you Ubuy. ”

02 October 2026 · via Trustpilot

Anna

Verified buyer

“3D Crystal Puzzles - Roses In A Vase (Black and Purple) Brilliant transaction! Thank you so much for your excellent service! Items are exactly as described, in great condition and package very well, quality and appearance are excellent and the price was amazing. Fast delivery too! Highly recommended!”

07 October 2026 · via Trustpilot

WHY SHOP WITH US

Secure Checkout Global Delivery Easy Returns Genuine Products

Product Price History

Important information

Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.

AUD 44

Order now and get it around Tuesday, November 03

QTY:

Secured transaction

PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.

Our Top Logistics Partners

Fastest cross-border delivery

Features & Benefits

Maximizes plant growth by providing optimal phosphorus levels.
Nitrate-free formulation eliminates overdose risk.
Easy dosing for beginners and experts alike.
Compatible with Flourish Nitrogenª and Flourish Potassiumª.
Promotes growth of aquatic plants without encouraging algae.
Tested for guaranteed quality with clear instructions.

Ubuy Assurance

Experience worry-free shopping with 100% original products, PCI DSS-compliant payment security, ISO 27001-certified data protection, the fastest cross-border delivery, free returns ^*, and secure packaging on every order.

Flourish Phosphorus Plant Supplement 500ml