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.
Flourish Phosphorus™ Dosing Table
The following dosing table provides the "beginner" dose of Flourish Phosphorus™ for various water volumes. This table applies to bottles of 100 mL - 500 mL. Please note that the 2L and 4L bottles of Flourish Phosphorus™ have larger cap volumes than the smaller bottles.
|Water Volume||Dose in mL||Dose in caps||Dose in drops|
|1 quart (1 L)||0.025 mL||1/160 Capful||0.6 Drops|
|1 gallon (4 L)||0.1 mL||1/40 Capful||2.5 Drops|
|5 gallons (20 L)||0.6 mL||1/8 Capful||12.5 Drops|
|10 gallons (40 L)||1.25 mL||1/4 Capful||25 Drops|
|20 gallons (80 L)||2.5 mL||1/2 Capful||50 Drops|
|40 gallons (160 L)||5 mL||1 Capful||100 Drops|
|50 gallons (200 L)||6 mL||1 1/4 Capful||120 Drops|