Fertilizer Tabs for Ponds and Aquariums
$10 X10 Root Tabs Plant Fertiliser Each tablet contains the following essential nutrients: Nitrogen Phosphorus Potassium Sulphur Calcium Magnesium Iron Boron Copper (low level that's safe for invertebrates such as shrimp) Manganese Molybdenum Zinc FISH SAFE Each tablet lasts for about 6 months