Osmocote Fertilizer Capsules
Osmocote Fertilizer Capsules
$4.99
$9.99
Osmocote Fertilizer (10)Capsules for Aquariums
What They Do
Osmocote capsules are slow-release root fertilizers that provide essential nutrients directly to your aquarium plants. They support stronger roots, vibrant growth, and healthier aquascapes.
How to Use
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Preparation
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Make sure your substrate is at least 2–3 inches deep.
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Works best with rooted plants (Amazon Swords, Cryptocoryne, Lotus, etc.).
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Placement
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Push each capsule 1 inch (2–3 cm) below the substrate, directly under or near plant roots.
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Avoid leaving capsules exposed on the surface.
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Dosage by Tank Size
Aquarium Size Light Planting Heavy Planting / Root Feeders Up to 10 gal 2–3 capsules 3–4 capsules 10–20 gal 4–5 capsules 6–8 capsules 20–40 gal 6–8 capsules 10–12 capsules 40–75 gal 10–12 capsules 15–18 capsules 75+ gal 15–20 capsules 20–25+ capsules (spread evenly) 💡 Tip: Adjust for fish load — heavily stocked tanks may need fewer capsules since fish waste adds nutrients.
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Frequency
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Capsules release nutrients slowly for 2–3 months.
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Replenish every 8–12 weeks or when plants show signs of nutrient deficiency (yellowing, slow growth).
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Ingredients (NPK 15-9-12 + Micronutrients)
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Nitrogen (N): Encourages leafy growth
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Phosphorus (P): Supports root development
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Potassium (K): Boosts plant health and color
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Magnesium, Sulfur, Iron: Essential for chlorophyll and photosynthesis
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Trace elements (Mn, Cu, Zn, B, Mo): Support overall plant vitality
Extra Tips
✅ Place directly under heavy root feeders for best results.
✅ Use fewer capsules if your tank is lightly planted or heavily stocked with fish.
✅ Combine with liquid fertilizers for stem plants, mosses, and floating plants.
✅ Avoid overuse — excess nutrients may cause algae blooms.
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