Seachem brand liquid macro nutrients for live aquarium plants available in a convenient three-pack for lush, healthy plant growth. Excellent for beginning aquatic gardeners, the Seachem Plant Pack Enhancer NPK Liquid Plant Nutrient Kit includes 100 ml bottle each of Flourish Nitrogen, Flourish Potassium, and Flourish Phosphorous liquid plant nutrients. Great as a trial pack for freshwater planted aquarium hobbyists unfamiliar with the Seachem brand.

Flourish Nitrogen™
Flourish Nitrogen™ is a concentrated (15,000 mg/l) blend of nitrogen sources. It provides nitrogen in both the nitrate form and the plant-preferred ammonium form. However, no free ammonia is released because the ammonium in Flourish Nitrogen™ is complexed and unavailable until utilized by the plants. Flourish Nitrogen™ also provides nitrate for those plants that can readily utilize nitrate as well.

Directions:
Beginner
Use 2.5 ml (half a cap) for each 160 l (40 us gallons) twice a week or as needed in response to signs of nitrogen deficiency (e.g. stunted growth, chlorosis). For smaller doses, please note that each cap thread is approximately 1 ml.

Expert
The beginner dose raises nitrogen by the same degree that 1 mg/l nitrate would. This dose is sufficient to provide approximately 4 g of growth (dry) or about 20 g (hydrated) over a 1 month period (assuming all other necessary nutrients are provided). For increased growth use proportionately more.

To target a specific nitrogen increase, dose according to the following formula: 0.25vn=m, where v= volume of tank in gallons, n=desired nitrogen increase (if using a “nitrate equivalent” value for “n” then use a factor of 0.05 instead of 0.25 in the formula) and m=volume of product to use in ml. For example, to raise 20 gallons by 0.20 mg/l nitrogen you would use: 0.25*20*0.20=1 ml.

Because one-half of the nitrogen in Flourish Nitrogen™ is from nitrate you can get a reasonable estimate of nitrogen levels by doubling a nitrate reading.

Flourish Nitrogen™

Flourish Phosphorus™
Flourish Phosphorus™ is a safe solution of potassium phosphate that takes the guess work out 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. Likewise, because Flourish Nitrogen™ is phosphate free you can use both products together to target exactly the ideal amounts of each for your system.

Directions:
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 a phosphate test kit 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™

Flourish Potassium™
Flourish Potassium™ contains 40,000 mg/L of potassium suitable for the natural freshwater aquarium. Potassium is an important element that is needed by all plants. In a thriving planted aquarium, it can become the limiting factor to growth if it is depleted.

Directions:
Use 1 capful (5 mL) for every 125 L (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.

Flourish Potassium™