Aquarium Root Tabs ( Slow release ) Want to kick start your aquarium? Try the best and cost effective Root Tablets available! A superior plant fertiliser that can be used for your plant aquariums! Without proper fertiliser, aquarium plants tend to gradually yellow, and eventually die. I have been using these for years and found these are the best to make my aquarium flourish with beautiful and healthy plants.Each tablet lasts for about 6 months before they need to be applied again.• 100% safe for fish (and even shrimp!)• Encourages accelerated growth of aquarium plants when they need them most• Promotes green and lush looking plants• Accelerates root growth• I recommend one tablet for every 5-10cm (be sure to plant deep where the roots are so tablets don't float)• Reapply after approximately 6 months (depends on many factors though such as water change frequency, amount of plants in the aquarium, temperature, lighting, etc.• Safe controlled release of essential nutrients and trace elements• Add some lighting and watch your aquarium bloom!*not recommended for tanks with fish that dig or sift through gravel Each tablet contains the following essential nutrients:NitrogenPhosphorusPotassiumSulphurCalciumMagnesiumIronBoronCopper (low level that's safe for invertebrates such as shrimp)ManganeseMolybdenumZinc INSTRUCTION: Insert 1 capsule every 10-15cm in a grid like pattern or place one tablet midway into the gravel bed next to every root feeding plant such as Echinodorus and Crypt species. Be sure to place them deep enough into the substrate so they don’t leach into the water column.Replace every 6-8 weeks or as needed depending on plant usageLCA root tabs can be used in conjunction with LCA All In One FertiliserWill not harm any fish shrimps or aquatic life