Bonemeal is an item that players need during and after Ghosts Ahoy. It consists of a pot filled with any type of bones that have been crushed in the bone grinder at the Ectofuntus.
Along with a bucket of slime, players may use a pot of bonemeal to make 5 ecto-tokens. The bones used in the bonemeal give 4 times the Prayerexperience when used to worship the Ectofuntus. They are sorted separately per type of bonemeal in the bank account but are all labelled bonemeal. You can get the type via the examine option of the pot. It shows: A pot of crushed [type of bones]'.