Notes: You get an oily fishing rod by asking Gerrant about it and he gives you a blamish snail slime bottle. You then have to mix harralander with a vial of water, followed by mixing the snail slime liquid with the unfinished harralander potion then using the mixture on a normal fishing rod. You need a herblore level of 22 to clean the harralander and a herblore level of 25 to make the potion. It is required to fish Lava Eels during Heroes' Quest.