As always, whenever you turn in Nirnroots, it will take 24 hours for the potion of choice to be made.
Handing in 20 Nirnroots will get you a Moderate Potion of Exploration.
The effects are: 300 seconds of Night-Eye, and Fortifies Health and Fatigue by 20 for 300 seconds.
Handing in 30 Nirnroots will get you a Strong Potion of Exploration.
Its effects are: 300 seconds of Night-Eye, Fortification of Fatigue and Health by 20 (300 seconds). Blunt, Security, Destruction, Sneak, Blade, and Restoration are Fortified by 5 for 300 seconds also.
Handing in 40 Nirnroots will get you a Grand Potion of Exploration.
Its effects are: 300 seconds of Night-Eye. Fatigue and Health are fortified by 20 for 300 seconds. Blunt, Security, Destruction, Sneak, Blade, and Restoration are fortified by 10 for 300 seconds also.
Once you've done all these "quests," Sinderion will offer to pay 250 gold for 10 Nirnroots. This is ongoing and you can continue to do it but I don't really recommend it.
