sera floredepot Long-term gravel substrate with growth promoter for freshwater aquariums. sera floredepot should be used with new aquarium set-ups and larger rearrangements. It is free from nitrate and phosphate. sera floredepot contains essential nutrients, valuable humic acids, as well as trace elements, and provides the plants with everything they need for strong roots and deep green leaves during the first phase of taking root (4 - 6 weeks). Of course, sera floredepot is free from nitrate and phosphate. Distribute sera floredepot evenly on the space you have assigned for planting. During the initial phase, sera floredepot provides the plants with nutrients that the plants need for strong roots and green leaves. Please note this product will be charged an Extra $8.00 in shipping for the weight