Indoor Grow Tent plants looking poorly

[tehswordninja]

Will preface this with the fact that I am very much an amateur at growing vegetables indoors.
Most of the plants in the grow tent were looking great for a long time until an outbreak of powdery mildew. I bought and sprayed some potassium bicarbonate (which you can see on the reflective film) and that solved the mildew problem, but now my plants, from parsley to onions, all look speckled with patches of discolor. The bean plants in particular have been dropping leaves. Is this due to the bicarbonate, or some other factor? I wouldn't be shocked if I used too much.
I've been fertilizing and watering consistently and light does not seem to be an issue.

 

[mkmiraglia]

I would never grow vegetables inside one of those little "grow houses." Better to call it a plant oven. Direct sun on that puppy for 20 minutes will cook all your plants.

 

[tehswordninja]

Good thing it isn't in direct sunlight then

 

[mkmiraglia]

Well, it's working very well for you, isn't it? I rest my case.

 

[Logan]

The videos that I've seen with grow light tents the leaves are always lighter than out of it.