Flourish Phosphorus^™

Phosphorus supplement for the planted aquarium
A safe 4500 mg/L solution of potassium phosphate
Takes the guesswork out of phosphate dosing

Overview

Phosphorus is one of the main three macro nutrients (nitrogen, phosphorous, potassium: NPK) required by plants and can often become the limiting factor to growth in a flourishing system. Flourish Phosphorus™ is a safe solution (4,500 mg/L phosphate) of potassium phosphate that takes the guess work out of phosphate dosing. Unlike competing products that mix nitrate and phosphate in a fixed ratio, Flourish Phosphorus™ (being nitrate free) allows you to dose phosphorus according to the needs of your plants without the risk of overdosing nitrates. When used as directed, Flourish Phosphorus™will enhance and accelerate the growth of aquatic plants without enhancing algae growth. For maximum benefit, use with Flourish Nitrogen™ and Flourish Potassium™. Flourish Phosphorus™ is safe for invertebrates such as shrimp.

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

Beginner

Use 2.5 mL (half a cap) for each 80 L (20 US gallons) once or twice a week or as needed in response to signs of phosphorus deficiency (e.g. stunted growth, plant dark green).

Expert

The beginner dose raises phosphorus by 0.05 mg/L (0.15 mg/L phosphate). The ideal phosphate level will vary, but generally ranges from 0.15–1.0 mg/L. Use MultiTest™ Phosphate to monitor phosphate levels. To target a specific phosphate increase, dose according to the following formula: 0.8vp=m, where v= volume of tank in gallons, p=desired phosphate increase and m=volume of product to use in mL. For example to raise 20 gallons to 0.1 mg/L phosphate you would use: 0.8*20*0.1=1.6 mL.

Water Volume

Units

Current P mg/L (ppm)

Desired P mg/L (ppm)

To reach your desired level use

mL ( caps)

Considerations: Use once or twice a week or as needed in response to signs of phosphorus deficiency (e.g. stunted growth, plant dark green). The ideal phosphate level will vary, but generally ranges from 0.15–1.0 mg/L. Use MultiTest™ Phosphate to monitor phosphate levels.

FAQ

I thought phosphates were bad and could lead to unwanted algae growth. Why would I want to add it my aquarium?

A: This is true, but only when phosphorus levels become excessive, that is, when there is more phosphorus available than the plants can use. When this happens, it becomes available to algae. Phosphorus is still vital to plant growth, though. Flourish Phosphorus should be used in cases where there is a phosphorus deficiency.

Can't find what you're looking for? Ask us a new question. One of the experts from our technical support staff will be happy to promptly respond. You can also call 888‑732‑0003 (Monday- Friday 9:00 AM - 5:00 PM EST) if you would like to speak directly with a technical support representative.

Ingredients

Amounts per 1 g
Available Phosphate (P₂O₅)	0.3%
Soluble Potash (K₂O)	0.2%

Derived from: Potassium phosphate

Safety

Download Safety Data Sheet (SDS)

Download Images

0195	Flourish Phosphorus 100 mL
0196	Flourish Phosphorus 250 mL
0193	Flourish Phosphorus 500 mL
0198	Flourish Phosphorus 2 L
0199	Flourish Phosphorus 4 L

Planted

Flourish Phosphorus™