Aquaforest AF K Boost 250ml is a professional freshwater planted aquarium potassium supplement designed to raise potassium levels and provide aquatic plants with an easily absorbable source of this essential macro nutrient. Ideal for planted aquariums, aquascapes, high-light systems and CO2-fertilised tanks, this concentrated liquid fertiliser helps prevent potassium deficiency and supports strong, healthy plant growth. Potassium plays an important role in aquatic plant health, supporting enzyme activity, osmotic regulation and the transport of nutrients within the plant. In fast-growing planted aquariums, especially those with strong lighting, CO2 injection and regular fertilisation, potassium can become depleted quickly. Aquaforest AF K Boost allows aquarists to raise potassium accurately and maintain a balanced nutrient profile for lush, healthy aquatic plant growth. Key Features Professional potassium supplement for freshwater planted aquariums Provides easily absorbable potassium for aquatic plants Helps raise and maintain potassium levels Supports healthy growth, strong leaves and plant vitality Useful in high-light and CO2-fertilised aquariums Helps prevent potassium deficiency in aquatic plants Can help reduce yellowing leaf edges, damaged leaf tips and later-stage necrosis linked to low potassium Recommended for use alongside AF Micro, AF PO4 Boost and AF N Boost Concentrated liquid formula for accurate dosing 250ml bottle, ideal for regular planted aquarium fertilisation Product Overview Aquaforest AF K Boost has been developed for freshwater aquarists who need precise control over potassium levels in planted aquariums. Potassium is an essential plant nutrient and is used in many internal plant processes, including nutrient movement, water balance and biochemical reactions. Although potassium is often included in complete fertilisers, heavily planted aquariums may require additional targeted supplementation. This is especially true in aquascapes with fast-growing stem plants, strong lighting and CO2 injection, where nutrient uptake is high. AF K Boost allows potassium to be increased in a measured way, helping maintain healthier and more consistent plant growth. Benefits for Planted Aquariums Aquaforest AF K Boost helps prevent potassium deficiency, which can show as yellowing around the edges and tops of leaves. If left uncorrected, potassium deficiency can progress to damaged tissue, holes, weak growth and necrosis in more severe cases. By supplying potassium in a fast-absorbing liquid form, AF K Boost helps plants recover from deficiency and continue healthy growth. Used as part of a balanced fertilising routine, it supports better leaf condition, stronger structure and improved overall plant performance. Suitable For Aquaforest AF K Boost 250ml is suitable for: Freshwater planted aquariums Aquascaped tanks High-light planted systems CO2-fertilised aquariums Heavily planted aquariums Fast-growing stem plant layouts Aquariums with low potassium levels Tanks showing signs of potassium deficiency Aquarists using individual nutrient dosing Planted tanks requiring controlled potassium supplementation This product is designed for freshwater planted aquarium use and should be dosed according to plant demand and water testing where possible. How to Use Shake well before use. Dose Aquaforest AF K Boost directly into the aquarium in an area of good water movement, or mix into dosing water as part of a planned fertilising routine. Supplement until the desired plant response and potassium level are achieved. Aquaforest recommends using AF K Boost alongside AF Micro, AF PO4 Boost and AF N Boost for a more complete planted aquarium fertilising routine. Dosing Advice Recommended dosage: 1ml per 10 litres of aquarium water raises potassium by approximately 5mg/l. Aquaforest recommends maintaining potassium between 10–20mg/l in freshwater planted aquariums. Dose according to aquarium size, plant mass, lighting strength, CO2 use and fertiliser routine. Avoid unnecessary overdosing and monitor plant response carefully. Absorbent filter media such as zeolite and activated carbon may reduce the effectiveness of the formula, so consider limiting these media when using targeted plant fertilisers. When to Use Aquaforest AF K Boost is useful when: Potassium levels are too low in a planted aquarium Aquatic plants show signs of potassium deficiency Leaf edges or tips begin to yellow Plant tissue becomes weak, damaged or necrotic Maintaining high-light or CO2-injected aquascapes Fast-growing plants are consuming nutrients quickly Using individual nutrient dosing instead of an all-in-one fertiliser Balancing potassium alongside nitrogen, phosphate and micronutrients Storage Store in a cool, dry place away from direct sunlight. Keep at room temperature in a tightly closed container. Keep out of reach of children. This product is intended for aquarium use only and is not suitable for consumption. Product Details Product: Aquaforest AF K BoostBrand: AquaforestSize: 250mlProduct Type: Freshwater aquarium plant fertiliserSupplement Type: Potassium supplementAquarium Type: FreshwaterUse: Raising potassium levels and preventing potassium deficiencyDosage: 1ml per 10 litres raises potassium by approximately 5mg/lRecommended Potassium Level: 10–20mg/lSuitable For: Planted aquariums, aquascapes, high-light tanks and CO2-fertilised systems Why Choose Aquaforest AF K Boost? Aquaforest AF K Boost is a practical choice for planted aquarium keepers who want accurate control over potassium levels. In demanding aquascapes and CO2-fertilised aquariums, plants can quickly consume available potassium, leading to deficiency, yellowing leaf edges and reduced plant condition. Used as part of a balanced fertilising routine, AF K Boost helps maintain healthier aquatic plants, stronger growth and more stable nutrient availability. It is especially useful for aquarists who prefer individual nutrient dosing and want to fine-tune potassium separately from nitrogen, phosphate and micronutrients. Recommended For Aquaforest AF K Boost 250ml is recommended for freshwater aquarists maintaining planted aquariums, aquascapes and CO2-fertilised systems where potassium levels need to be increased or stabilised. It is ideal for correcting potassium deficiency, supporting healthy leaf development and maintaining balanced macro nutrition in high-demand planted tanks.
