The resin is embedded with live Glosso plant seeds that'll sprout in 4 to 10 days after placing into your freshwater aquarium! There's no need to place seeds into decorations or your tank's bottom surface! Simply submerge the resins into a freshwater tank, and watch them grow into an amazing aquascape! They're safe and healthy for freshwater fish! Here is a quick list of things that can help the Glosso seeds grow and thrive in your aquarium. 1) Use good filtration to keep the water clean and aerated. 2) Keep water temperature between 70 - 80 degrees Fahrenheit. 3) Maintain a PH range of 4.0 - 8.0. 4) Use a high-quality plant grow light. 5) Additional Carbon Dioxide (CO2) supply will assist in growth.