Seachem Flourish Phosphorus 250ml
A phosphorous supplement for planted aquariums. 250ml treats 500-5000 US gallons. Phosphorous is one of the main three macro nutrients (nitrogen, phosphorous and potassium) required by plants and can often be a limiting factor to growth in a flourishing system. Flourish phosphorous is a safe solution (4500 mg/l phosphate) of potassium phosphate that takes the guess work out of phosphate dosing. Unlike other products that mix nitrate and phosphate in a fixed ratio, flourish phosphate (being nitrate free) allows you to dose phosphorous according to the needs of your plants without the risk of overdosing nitrates. When used as directed Flourish phosphorous with enhance and accelerate the growth of aquatic plants without enhancing algae growth. For maximum benefits use with Flourish Nitrogen and Potassium.
A phosphorous supplement for planted aquariums. 250ml treats 500-5000 US gallons. Phosphorous is one of the main three macro nutrients (nitrogen, phosphorous and potassium) required by plants and can often be a limiting factor to growth in a flourishing system. Flourish phosphorous is a safe solution (4500 mg/l phosphate) of potassium phosphate that takes the guess work out of phosphate dosing. Unlike other products that mix nitrate and phosphate in a fixed ratio, flourish phosphate (being nitrate free) allows you to dose phosphorous according to the needs of your plants without the risk of overdosing nitrates. When used as directed Flourish phosphorous with enhance and accelerate the growth of aquatic plants without enhancing algae growth. For maximum benefits use with Flourish Nitrogen and Potassium.
A phosphorous supplement for planted aquariums. 250ml treats 500-5000 US gallons. Phosphorous is one of the main three macro nutrients (nitrogen, phosphorous and potassium) required by plants and can often be a limiting factor to growth in a flourishing system. Flourish phosphorous is a safe solution (4500 mg/l phosphate) of potassium phosphate that takes the guess work out of phosphate dosing. Unlike other products that mix nitrate and phosphate in a fixed ratio, flourish phosphate (being nitrate free) allows you to dose phosphorous according to the needs of your plants without the risk of overdosing nitrates. When used as directed Flourish phosphorous with enhance and accelerate the growth of aquatic plants without enhancing algae growth. For maximum benefits use with Flourish Nitrogen and Potassium.
A phosphorous supplement for planted aquariums. 250ml treats 500-5000 US gallons. Phosphorous is one of the main three macro nutrients (nitrogen, phosphorous and potassium) required by plants and can often be a limiting factor to growth in a flourishing system. Flourish phosphorous is a safe solution (4500 mg/l phosphate) of potassium phosphate that takes the guess work out of phosphate dosing. Unlike other products that mix nitrate and phosphate in a fixed ratio, flourish phosphate (being nitrate free) allows you to dose phosphorous according to the needs of your plants without the risk of overdosing nitrates. When used as directed Flourish phosphorous with enhance and accelerate the growth of aquatic plants without enhancing algae growth. For maximum benefits use with Flourish Nitrogen and Potassium.
in 9 offers
The lowest price for Seachem Flourish Phosphorus 250ml right now is $8.52 at peta2z.com, compared across 9 retailers.
The all-time low was $8.30 on 8 May 2026 — today's price is 3% above the lowest ever. This is at or near its all-time low — a good time to buy.
Prices last updated 8 June 2026.
Last updated at 08/06/2026 01:02:40
Seachem, Seachem Laboratories Flourish Phosphorus Plant Supplement, 1 Each/8.5 Oz
Delivery $20.04
Seachem Flourish Phosphorous 250ml
Seachem Flourish Phosphorus 250ml - Aquaristic Online
Delivery $14
Seachem Flourish Phosphorus 250mL - Plant FoodBy Aquarium Kingdom
Delivery between Fri – Sun $8.95
Flourish Phosphorus 250 ml
Delivery between 10–16 June $38.67
Seachem Flourish Phosphorus 250ml (SC19606)
Delivery $10
Seachem Flourish Phosphorus 250mL
Delivery between Wed – Fri $7.74
Seachem Flourish Phosphorus 250ml
30-day returns
Flourish Phosphorus, 250 mL / 8.5 fl. oz.
Free delivery between 17–19 June
| Liquid volume | 250 Millilitres |
| Target species | Shrimp |
| Allergen information | Yam Free |
| Product dimensions | 4.93 x 4.93 x 16.51 cm; 294.84 Grams |
| Country of origin | USA |
Seachem, Seachem Laboratories Flourish Phosphorus Plant Supplement, 1 Each/8.5 Oz
Delivery $20.04
Seachem Flourish Phosphorous 250ml
Seachem Flourish Phosphorus 250ml - Aquaristic Online
Delivery $14
Seachem Flourish Phosphorus 250mL - Plant FoodBy Aquarium Kingdom
Delivery between Fri – Sun $8.95
Flourish Phosphorus 250 ml
Delivery between 10–16 June $38.67
| Liquid volume | 250 Millilitres |
| Target species | Shrimp |
| Allergen information | Yam Free |
| Product dimensions | 4.93 x 4.93 x 16.51 cm; 294.84 Grams |
| Country of origin | USA |
