I have found pebble trays to only work if they are quite large. Under my lights is a 4ft by 2 ft tray filled with 2 inches of LECA and that does certainly raise the humidity but I still use a humidifier. I would get a humidifier if I was you. http://www.amazon.com/Lasko-1128-Evaporative-Recirculating-Humidifier/dp/B00FGLPCN8/ref=sr_1_1?ie=UTF8&qid=1452806600&sr=8-1&keywords=lasko+humidifier+1128 I have this and I really like it. It has a huge tank so it rarely needed refilled and it circulates the water, which really cuts down on algae growth. Also, your roots don't really look that bad. They have some damage but they aren't rotted or shriveled so they are probably still working well for the plants. I would advise against dunking for watering. Its a good way to spread disease and pests. You can probably remove whatever is filtering the light if you are growing in a west window.They can take the light, especially now in the winter. I would just make sure it doesn't get too hot in the window in the summer. I have had good luck with seaweed extract. Also , the last plant looks a bit overpotted. With Phals, I usually pot into the smallest pot I can fit all the roots in after I have removed all the old media and trimmed the dead roots.
> Main disadvantage is you need some plants to get a comfortable moisture level inside otherwise all your furniture will zap you because of the static electricity.
If you have forced air heating you should be able to get a humidifier installed in the system, if you dont have central air heating, an evaporative humidifier is life changing.
I have this for my 1br apt and its overkill, i have to leave it on the lowest setting or it turns into a swamp in here. https://smile.amazon.com/Lasko-1128-Evaporative-Recirculating-Humidifier/dp/B00FGLPCN8
My parents have a big old house though and they have something like this centrally located.
https://smile.amazon.com/H12-300HB-Whole-House-Console-Style-Evaporative-Humidifier/dp/B00B5U8GL4/
And these things on the back of every radiator.
https://s-media-cache-ak0.pinimg.com/236x/1d/61/43/1d61431a4e150a9f1d878d8a59c2aa48.jpg