The first auto flower and also my first hydroponics to have made it this far I must say I am Satisfied and believe she has just begun and there's a lot more she have in store π. Stay tuned!
I got some spots on the leaves of this autoflower in hydroponics also there's a little discolouration in the roots I'm not sure if that's the reason any help is appreciated.
Looked like you have some rot going on. You can treat her with some peroxide for a day, change the water, and then incorporate a compost tea without using molasses. Brewing a proper batch of compost tea and adding it after every res change will help keep the good bacteria flourishing which will kill off the bad destroying your roots. Also, make sure you have good airflow, turn that reservoir into a cold jacuzzi for your roots.
You may have to trim away some of the dead root material and as a last resort, you can transplant her into coco coir. Coco will retain a lot more oxygen in the root zone which also kills off the bad bacteria and you can use your hydro nutes. I personally have done this last step to save 2 dec plants.