Size: 2 L
Flourish Excel is a source of bioavailable organic carbon. All plants require a source of carbon. This is typically obtained from CO2, but, may also be derived from simple organic compounds.

KEY FEATURES:

Bioavailable organic carbon source for the planted aquarium
Use as an alternative to CO2 injection or in addition to it
Introduces photosynthetic intermediates
DIRECTIONS:
On initial use or after a major (> 40%) water change, use 1 capful (5mL) for every 40L (10 US gallons). Thereafter use 1 capful for every 200L (50 US gallons) daily or every other day. For smaller dosing please note that each cap thread is approximately 1mL.

Size: 100 ml
Flourish Trace supplies a broad range of trace elements demonstrated to be necessary for proper plant health and growth (see below for signs of deficiencies). Trace elements are normally depleted by utilization, oxidation and precipitation.

KEY FEATURES:

Provide a broad range of micro-nutrients (vitamins, amino acids) and micro and trace elements (iron, manganese, nickel, cobalt, etc) that will enhance plant health and growth. Signs of Trace Element Deficiencies.
Boron: Death of stem and root apical meristem, leaves twisted, young tissue most affected.
Cobalt: used for nitrogen fixation, same as nitrogen deficiency signs (stunted growth).
Copper: Young leaves dark green, twisted, wilted, tip remains alive.
Manganese: Chlorosis of young leaves, with smallest veins remaining green, necrosis between veins.
Molybdenum: Chlorosis, twisting, death of young leaves.
Zinc: Reduced leaf size, shortened internodes, chlorosis, spotted leaves, older leaves most affected.
Nickel: lack of germination or seed formation, required for iron absorption.

Size: 250 mL
Flourish Phosphorus is a safe solution (4,500 mg/L phosphate) of potassium phosphate that takes the guess work out of phosphate dosing.

KEY FEATURES:
Phosphorus supplement for the planted aquarium
A safe 4500 mg/L solution of potassium phosphate
Takes the guesswork out of phosphate dosing
DIRECTIONS:
Beginner
Use 2.5mL (half a cap) for each 80L (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.

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 Nitrogen is a concentrated blend of nitrogen sources. It provides nitrogen in both the nitrate form and the plant–preferred ammonium form.

Key Features:

– Provides nitrate for those plants that can readily utilize nitrate.

– Provides nitrogen in both the nitrate form and the ammonium form.

Size: 250 mL
Flourish Potassium contains 50,000 mg/L of potassium suitable for the natural planted aquarium. Potassium is one of several elements that are vitally important to maintaining a vigorous level of growth in a planted aquarium.

KEY FEATURES:
Potassium supplement for the planted aquarium
Highly concentrated (50,000 mg/L)
Does not contain phosphate or nitrate making it ideal for use with Flourish Nitrogen and Flourish Phosphorus
DIRECTIONS:
Use 1 capful (5mL) for every 125L (30 US gallons). This dose raises potassium by 2 mg/L. Repeat 2-3 times per week or as needed in response to signs of potassium deficiency in older leaves which include: chlorosis (yellowing), necrosis (death/browning), pinholes in leaves, and weak stems and roots.