Speak to Clamik at 3598, -1013, 1738 in Salt Breeze to begin this quest.
You have two minutes to work on curing poisoned othmir. The mats will empty and they will come lay down one by one. They have colored sparkly auras which indicate their condition (just like a health bar - red, orange, yellow, green).
Click the glowing bowl on the ground when you need more doses of the potion.
A few of the red othmir are at half health, and a single antidote will push them back into yellow, where they'll die much more slowly.
Roughly 3 of them come to you in critical condition.
If you let 4 die, you will fail and have to restart.
Players on the forums suggest to focus healing three othmir that are next to each other and/or try multiple doses on each othmir you're healing.