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. Seachem 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, Seachem 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 increasing algae growth. For maximum benefit, use with Flourish Nitrogen and Flourish Potassium. Seachem Flourish Phosphorus is safe for invertebrates such as shrimp.
BEGINNER: Use 2.5ml for each 80L once or twice a week or as needed in response to signs of phosphorus deficiency (e.g. stunted growth or plants turning 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. 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=1.6ml.
100ml, 250ml, 500ml, 2Ltr & 4Ltr
Order before 2:00pm for same day dispatch
Orders under £49
Standard Delivery Service - £3.95
Delivery takes 1-2 working days and will be shipped via Royal Mail 24.
UK Express Delivery - £5.95
Upgrade your order to next working day delivery via Interlink courier.
Orders Over £49
UK Express Delivery - FREE!
FREE next working day delivery via Interlink courier.
If for any reason you are not satisfied with your purchase from Pond Planet, you may return the product(s) to us within 14 days of the purchase date for a refund or exchange.
Goods must be returned in perfect and unused condition, in their original packaging. The buyer must ensures that the goods are securely and adequately packed to avoid damage and the purchaser pays all postage costs. We recommend that products are returned by recorded delivery or by carrier that requires a signature. Pond Planet accepts no responsibility for goods returned to us unless signed proof can be provided.
You can use any of the payment types listed at the bottom of the page to pay for your order. Your details are safe with us as we take security very seriously indeed.
We also take fraud very seriously so all credit and debit card transactions are subject to validation, authorisation and security checks by both the card issuer and ourselves.
Please note - We DON'T store your credit card details on line.
We collect information about you for two reasons: firstly, to process your order and second, to provide you with the best possible service.
We will not email you in the future unless you have given your consent and will give you the chance to refuse any marketing email from thereafter.