aerogarden growth stunted!

Hey all,
this is my first grow of any sort and i chose the aerogarden because I thought it would be the easiest intro to any kind of growing... I sort of followed the guide on here but mostly just followed the booklet that came with the AG deluxe. I have been pretty much guesstimating most aspects and kind of just played it by ear which worked brilliantly up until the other day when I decided to relocate my AG because it was way too bright to have in my room. I'm not sure if I stressed the hell out of the plant by taking it from a warm walk-in closet to the cold laundry where it is sitting on tiles but it hasn't been right since. Also some factors I have not even bothered to address because I don't have the required materials - PH of the water, CO2 level, humidity and even temperature I have kind of just hoped for the best. Current status is I think my growth is stunted in the vegetative phase - I think the whole process is about a month in. The leaves are starting to droop and there are small yellow dots on some of them. I tried to address this by adding a nutrient I found at the hardware store but I don't think it was the right kind because it made the water all murky and did not dissolve properly so I am considering purchasing some cal-mag stuff made for aeroponics and I am also getting some PH stuff. I have no idea if my plant is male or female or anything like that I'm just doing this as a first experiment and I just want to know if anyone can tell me how to revive my ailing plant? I have been using the default lights on the AG and have been using the 24 hour cycle for veg phase.

Can anyone offer any advice for a total noob?

I used to grow in an Aerogarden. I didn't use the lights. Instead, I used outboard CFLs. Like you at first, I was winging it. I will say one of the most important things I learned is controlling the pH levels. I noticed in my grows, the pH levels would really swing up and down. I controlled it with pH up or pH down. You might also think about getting a TDS meter to monitor the PPM. That will let you know when to add nutrients. I would advise you to change the water in the reservoir at least once a week, check the pH before and after adding nutrients. I used Fox Farms nutrients but there are many to choose from. You might want to check out Hygrozyme and Hydroguard. I never cared for the Aerogarden nutrients. BTW, those roots are going to get really big and consume a lot of nutrients so you will be adding water a lot once it starts flowering. One plant is about all you can grow in the Aerogarden. I wish you luck.