Answer by  
                                                                                          Shirley277 (35)
                                                            
                          
                          
                                                           I think coco husk substrate, sandy top soil or compost (without fertilisers), sphagnum moss, peat, live moss and a selection of live plants will help increase the humidity in the setup. Never use gravel in your Oriental Fire-Bellied Toad's terrarium, as they can become impacted if they ingest it.