Don't worry if the plants flail around due to weak stems, they will perk up after awhile of having the fan on. They will head for the light and strengthen there stalks while doing so. The buckets you used really make it hard to water since they are narrow and solid plastic. So they will get swampy at the bottom while the tops feel really dry. If you could add more perlite to the mix that would help with this problem. If you have large holes at the bottom of pot, stick your finger in and see how wet the soil is, it may not hurt to get a small drill bit and put some small holes around the bottom of the pot to allow more air in there. Hydro farm pots have little cut outs on the side of there square white pots that seem to work good at that. I didn't noticed if you raised the pots up a little, but if you haven't I would also agree with the person that said you should raise them. So far you learned a hard lesson but it's all about learning. The MG thing may be there a little but I wouldn't worry about that till you get your roots back from the drowning them. I had the same issue many years ago and I also thought it was MG and it really from chronic overwatering and loss of root mass. They looked like they are bouncing back. There leaves have perked up quite a bit and they look like they are starting to really bounce back. I would also say you not only need more light, but also the right kind of light. You would not believe the difference from using a hortalux bulb vs a cheap grow bulb. I even used a sunmaster which was a middle of the road bulb and the hortalux blew it out of the water and brought out colors I was not able to get before. So getting a proper light would make a world of difference in your grow. Esp when you start flowering. There is nothing like the density of the buds grown under a 1000watt with a high quality horticulture bulb. If you want hightechgarden supply has some cheap packages that seem to hold up over time. I have one ballast that is going on year number 6 with out one issue. It's an old 600w digital ballast, that I just got due to price and so far it was worth every penny. There hoods are a little cheap but they get the job done and since you seem a little short on funds I would say its worth a shot. Or try eBay for other options, you may find a nice used setup for cheap on there too. Good luck and happy growing! It's a fun and sometimes frustrating journey but it is worth it. Pot isn't addictive, but growing it is!!!!