Fellstalk potion (unf) are used to create Prayer renewals. Because these are often used to train Herblore, and adding Clean fellstalk to a Vial of water gives little experience, many players avoid the tedium of making unfinished potions and buy them directly from the Grand Exchange. This opens up an opportunity to make unfinished fellstalk potions for profit. Portable wells are optional but because it has a 5% chance of generating an extra unfinished potion, it is also useful if shared with other players. 2,310 Fellstalk potions can be made on an average raising the money per hour to .