You've got two issues that are the cause of your problems. First of all, your temperature is too high. You've got to get the temp down below 80°F. Higher than that and your plants will start to experience heat stress and growth will slow to a crawl. The second problem is that you are overwatering them. To properly water your plants, you must thoroughly saturate the soil to the point where water starts to flow out of the bottom drainage holes. Then, leave them alone until the soil is almost completely dry before watering them again. Given your temp, humidity, and container size, I estimate that you need to wait about 4 days in between waterings. When it's time to water again, repeat the saturation process I described, then again wait until the soil completely dries out before watering again.
You should not have given the plant epsom salt. It is not showing any signs of magnesium deficiency, so I'm not sure where you got the idea that treating it with epsom salt was a good idea. There's not much you can do about it now aside from flushing with plain water and continuing the watering routine I described. In the future if you have a problem, don't just start treating it with random nutrients because you don't know what to do. That is a sure-fire way to destroy your plants. Simply post your problem here and wait for a knowledgable response. I realize that you did that, but you got impatient when you didn't receive a response in what you considered to be a quick enough time. You have to realize that sometimes it can take more than 24 hours to get a solution. Usually it's quicker, but in all honesty, everyone in this community has a life outside of growing
marijuana and sometimes we're off living that life and can't respond within hours of a help request. Patience is the key.