Dymax Root Supplements provide essential nutrients for promoting the growth of aquatic plants. This supplement extracts the nutrients from the tropical substrate to provide essential nutrients for aquatic plants with luxuriant root development. The tab form supplement will not cause turbidity and inconvenience as compared to conservative gravel nutrients like laterite fertiliser. Directions: Insert Root Supplement tablet 3-5cm below gravel surface. Leave about 10cm spacing between each tablet. For individual plant: Insert 2-3 tablets to the gravel area where plant root develops. Repeat the process every 2-3 months. 50 tablets per box.