{"product_id":"seachem-flourish-potassium-250ml","title":"Seachem Flourish Potassium 250 mL – Planted Aquarium Potassium Supplement","description":"\u003cp\u003eSeachem Flourish Potassium 250 mL is a concentrated potassium supplement formulated for freshwater planted aquariums. Potassium is an essential macronutrient involved in plant growth, photosynthesis, nutrient transport, and the development of healthy leaves, stems, and roots.\u003c\/p\u003e\n\u003cp\u003eFlourish Potassium contains 50,000 mg\/L of elemental potassium derived from potassium sulfate. It allows aquarium keepers to increase potassium without intentionally adding nitrogen or phosphate, making it useful for targeted nutrient control in low-tech and high-tech planted aquariums.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConcentrated Potassium Supplement:\u003c\/strong\u003e Contains 50,000 mg\/L of elemental potassium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupports Healthy Plant Growth:\u003c\/strong\u003e Supplies potassium needed for leaves, stems, roots, and normal plant development\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelps Prevent Deficiency:\u003c\/strong\u003e Useful when older leaves show yellowing, browning, pinholes, or weak growth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo Added Nitrogen or Phosphate:\u003c\/strong\u003e Allows potassium to be adjusted independently from other macronutrients\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePotassium Sulfate Source:\u003c\/strong\u003e Provides potassium without relying on potassium nitrate or potassium phosphate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-Tech \u0026amp; High-Tech Use:\u003c\/strong\u003e Suitable for a wide range of freshwater planted aquarium setups\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConvenient 250 mL Bottle:\u003c\/strong\u003e Ideal for small to medium planted aquariums and targeted dosing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Seachem\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct:\u003c\/strong\u003e Flourish Potassium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 250 mL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEquivalent Size:\u003c\/strong\u003e Approximately 8.5 fl oz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Freshwater aquarium plant potassium supplement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePotassium Source:\u003c\/strong\u003e Potassium sulfate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElemental Potassium Concentration:\u003c\/strong\u003e 50,000 mg\/L\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuaranteed Soluble Potash:\u003c\/strong\u003e 6%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAquarium Type:\u003c\/strong\u003e Freshwater planted aquariums\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Dosage:\u003c\/strong\u003e 5 mL per 30 gallons\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFreshwater planted aquariums\u003c\/li\u003e\n\u003cli\u003eRapidly growing planted tanks\u003c\/li\u003e\n\u003cli\u003eLow-mineral source water\u003c\/li\u003e\n\u003cli\u003eRO or softened water used in planted aquariums\u003c\/li\u003e\n\u003cli\u003eOlder leaves showing potassium-deficiency symptoms\u003c\/li\u003e\n\u003cli\u003ePlants developing pinholes or browning leaf tissue\u003c\/li\u003e\n\u003cli\u003eWeak stems or roots\u003c\/li\u003e\n\u003cli\u003eLow-tech and high-tech planted aquariums\u003c\/li\u003e\n\u003cli\u003eTargeted potassium dosing alongside complete fertilizers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow to Use\u003c\/h3\u003e\n\u003cp\u003eUse one capful, or 5 mL, of Seachem Flourish Potassium for every 30 US gallons of aquarium water. Repeat two to three times per week or as needed in response to plant growth and signs of potassium deficiency.\u003c\/p\u003e\n\u003cp\u003eEach standard dose raises potassium by approximately 2 mg\/L. Calculate dosage using the aquarium’s estimated actual water volume after accounting for substrate, rocks, driftwood, decorations, and equipment.\u003c\/p\u003e\n\u003cp\u003eUse a dosing syringe for small aquariums or when amounts below one capful are required. Add the supplement to an area with good aquarium water movement.\u003c\/p\u003e\n\u003ch3\u003eApproximate Dosage Guide\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-Gallon Aquarium:\u003c\/strong\u003e Approximately 0.8 mL per dose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10-Gallon Aquarium:\u003c\/strong\u003e Approximately 1.7 mL per dose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20-Gallon Aquarium:\u003c\/strong\u003e Approximately 3.3 mL per dose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e30-Gallon Aquarium:\u003c\/strong\u003e 5 mL per dose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e40-Gallon Aquarium:\u003c\/strong\u003e Approximately 6.7 mL per dose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e55-Gallon Aquarium:\u003c\/strong\u003e Approximately 9.2 mL per dose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e75-Gallon Aquarium:\u003c\/strong\u003e Approximately 12.5 mL per dose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100-Gallon Aquarium:\u003c\/strong\u003e Approximately 16.7 mL per dose\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese amounts are proportional calculations based on Seachem’s standard dosage. Dose two to three times per week or adjust according to plant demand and visible deficiency symptoms.\u003c\/p\u003e\n\u003ch3\u003eSigns of Potassium Deficiency\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eYellowing on older leaves\u003c\/li\u003e\n\u003cli\u003eBrowning or dead areas on older leaves\u003c\/li\u003e\n\u003cli\u003ePinholes developing in leaf tissue\u003c\/li\u003e\n\u003cli\u003eWeak stems\u003c\/li\u003e\n\u003cli\u003eWeak or underdeveloped roots\u003c\/li\u003e\n\u003cli\u003eDeclining older leaves while new growth remains less affected\u003c\/li\u003e\n\u003cli\u003eReduced overall plant growth\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePotassium is mobile within plants, meaning plants can move it from older tissue into new growth. For this reason, potassium-deficiency symptoms often appear on older leaves first.\u003c\/p\u003e\n\u003ch3\u003eWhy Potassium Matters\u003c\/h3\u003e\n\u003cp\u003ePotassium is one of the primary macronutrients required by aquarium plants. It supports many biological functions, including nutrient transport, enzyme activity, water regulation, photosynthesis, and the development of healthy plant tissue.\u003c\/p\u003e\n\u003cp\u003ePotassium may become depleted in rapidly growing planted aquariums or when the source water contains low mineral levels. When potassium becomes the limiting nutrient, plant growth may slow even when lighting, carbon, nitrogen, and phosphorus are otherwise available.\u003c\/p\u003e\n\u003ch3\u003eNo Added Nitrogen or Phosphate\u003c\/h3\u003e\n\u003cp\u003eMany common potassium sources also contain nitrate or phosphate. This can make it difficult to increase potassium without simultaneously changing the aquarium’s nitrogen or phosphorus levels.\u003c\/p\u003e\n\u003cp\u003eFlourish Potassium is derived from potassium sulfate. This allows potassium to be supplemented independently, making it useful when nitrate and phosphate are already within the desired range.\u003c\/p\u003e\n\u003ch3\u003eUsing Flourish Potassium with Flourish\u003c\/h3\u003e\n\u003cp\u003eSeachem Flourish contains a broad blend of trace and minor nutrients but is not intended to provide large amounts of the primary macronutrients nitrogen, phosphorus, or potassium.\u003c\/p\u003e\n\u003cp\u003eFlourish Potassium may be used alongside Flourish when aquarium plants require additional potassium. It may also be combined with Seachem Flourish Nitrogen and Flourish Phosphorus as part of a targeted macronutrient routine.\u003c\/p\u003e\n\u003ch3\u003eUsing Flourish Potassium with Other Fertilizers\u003c\/h3\u003e\n\u003cp\u003eFlourish Potassium may be used alongside complete plant fertilizers, root tabs, iron supplements, carbon supplements, and other planted-aquarium products when each is dosed according to its label.\u003c\/p\u003e\n\u003cp\u003eAvoid directly mixing concentrated fertilizers together in the same container unless the manufacturer specifically permits it. Add each product separately into an area with good water circulation.\u003c\/p\u003e\n\u003ch3\u003ePlanted Aquarium Tips\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMeasure each dose carefully\u003c\/li\u003e\n\u003cli\u003eObserve older leaves for deficiency symptoms\u003c\/li\u003e\n\u003cli\u003eUse a dosing syringe for small aquariums\u003c\/li\u003e\n\u003cli\u003eMaintain balanced nitrogen, phosphorus, potassium, and trace nutrients\u003c\/li\u003e\n\u003cli\u003eProvide suitable aquarium lighting\u003c\/li\u003e\n\u003cli\u003eMaintain stable carbon availability\u003c\/li\u003e\n\u003cli\u003eRemove severely damaged or decaying leaves\u003c\/li\u003e\n\u003cli\u003eContinue regular water changes and aquarium maintenance\u003c\/li\u003e\n\u003cli\u003eKeep a dosing log to track plant response\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eImportant Planted Aquarium Note\u003c\/h3\u003e\n\u003cp\u003eFlourish Potassium is a targeted potassium supplement and does not replace a complete planted-aquarium fertilizer. Plants may also require nitrogen, phosphorus, iron, magnesium, trace elements, carbon, suitable lighting, and stable water conditions.\u003c\/p\u003e\n\u003cp\u003eYellowing and damaged leaves can have several causes, including nitrogen deficiency, magnesium deficiency, iron deficiency, inadequate carbon, poor lighting, root damage, or unstable aquarium conditions. Potassium deficiency is more commonly associated with symptoms appearing first on older leaves.\u003c\/p\u003e\n\u003cp\u003eAdding excessive potassium does not guarantee faster plant growth. Dose according to plant demand and aquarium conditions rather than automatically increasing the amount.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is Seachem Flourish Potassium used for?\u003c\/strong\u003e\u003cbr\u003eFlourish Potassium supplies concentrated potassium for freshwater aquarium plants and helps prevent or correct potassium deficiency.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow much Flourish Potassium should I use?\u003c\/strong\u003e\u003cbr\u003eUse 5 mL for every 30 US gallons two to three times per week or as needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow much does the standard dose raise potassium?\u003c\/strong\u003e\u003cbr\u003eA dose of 5 mL per 30 gallons raises potassium by approximately 2 mg\/L.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow concentrated is Flourish Potassium?\u003c\/strong\u003e\u003cbr\u003eIt contains 50,000 mg\/L of elemental potassium.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the potassium source?\u003c\/strong\u003e\u003cbr\u003eThe potassium is derived from potassium sulfate.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes Flourish Potassium add nitrogen or phosphate?\u003c\/strong\u003e\u003cbr\u003eNo. It is formulated to increase potassium without intentionally adding nitrogen or phosphate.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are common signs of potassium deficiency?\u003c\/strong\u003e\u003cbr\u003eSigns may include yellowing, browning, pinholes, or dead tissue on older leaves, along with weak stems and roots.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes Flourish Potassium replace Flourish?\u003c\/strong\u003e\u003cbr\u003eNo. Flourish Potassium supplies potassium only, while Flourish provides a broader mixture of trace and minor nutrients.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it be used with Flourish Nitrogen and Flourish Phosphorus?\u003c\/strong\u003e\u003cbr\u003eYes. Seachem specifically notes that Flourish Potassium is suitable for use with Flourish Nitrogen and Flourish Phosphorus when targeted macronutrient dosing is needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it be used in low-tech planted aquariums?\u003c\/strong\u003e\u003cbr\u003eYes. Use it when source water, plant growth, or visible symptoms indicate that additional potassium is needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs Flourish Potassium safe for freshwater shrimp?\u003c\/strong\u003e\u003cbr\u003eYes. Seachem states that Flourish Potassium is safe for freshwater shrimp, including Amano shrimp, when used as directed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan potassium be overdosed?\u003c\/strong\u003e\u003cbr\u003ePotassium is generally tolerated across a broad range, but unnecessary overdosing can create nutrient imbalance. Follow the label dosage and adjust according to plant demand.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes activated carbon remove Flourish Potassium?\u003c\/strong\u003e\u003cbr\u003eNo. Seachem states that carbon filtration does not remove Flourish Potassium from aquarium water.\u003c\/p\u003e\n\u003ch3\u003eAvailable at Tropical Treasures Wyo\u003c\/h3\u003e\n\u003cp\u003eSeachem Flourish Potassium 250 mL provides concentrated potassium for preventing deficiency and supporting healthy freshwater aquarium plant growth. Visit Tropical Treasures Wyo in Cheyenne, Wyoming, to shop Seachem plant supplements, live aquarium plants, root tabs, planted substrates, aquarium lighting, test kits, and aquascaping essentials.\u003c\/p\u003e","brand":"Tropical Treasures Wyo LLC","offers":[{"title":"Default Title","offer_id":52975092465877,"sku":null,"price":7.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/4545\/8133\/files\/SC04660-2T_4425e3c0-2a6c-4673-9954-fb42aec979e3.png?v=1784902093","url":"https:\/\/tropicaltreasureswyo.com\/products\/seachem-flourish-potassium-250ml","provider":"Tropical Treasures Wyo LLC","version":"1.0","type":"link"}