Something is wrong with my Girls!! Can someone PLEASE help!!

I am new to growing. But there is something going wrong with these girls. I got them from a friend and they were looking great. I have had them for about 2 weeks, but about 2 days after I got them they started to look weird.

The tips of some leaves are drying up, the new growth is turning yellow, and some of the leaves are stunted or something. (see pics)

Here is my set-up:

I have everything set-up in a basement bedroom. I have a Blackstar 500 LED light running 18 hours a day. I have been feeding Pure Blend Pro 10ml/liter, Cal-Mag 5ml/liter and Rhizo 10ml/liter (which is what they were being feed before so that hasn’t changed). I have only feed twice in the last week and a half, 6 days in between feedings. The PH of the first feeding was 7, and 6 or so the second time. I have a vent and a fan running 24/7. The temp is running about 70-75 and 50% humidity. I have had an issue with spider mites and have been spraying them with Mighty Wash every day. The floors are concrete but I have a rubber mat down.

I just don’t understand what is wrong with these girls. Any help would be appreciated.

Looks like flat out nute burn to me I would cut back for sure, here is a chart I can not see I am color blind. I would flush cut back on percentage of nutes and go from there but I am sure more experianced guys will chime in and help you out.

Potentially phosphorus deficiency...but not a set of symptoms I've seen before personally..

Are you using tap water?

PH fluctuation could be a problem, over watering could be an issue also. Here is a site that show good examples that may help you figure it out.

http://www.greenmanspage.com/guides/plant_abuse.html

I am using tap water but I am letting it sit a day or two before watering my plants. The nutrients are the same as they have been getting. They only thing that has changed is location, and lights, and I am on a different city water. But I have tried to ensure that I am doing everything the same as the home they came from to ensure as little stress on the plants as possible.

N abundance it looks like. feed less

If the only thing that has changed is your water source, if you are doing everything else the same and not over-watering....I would be a most concerned about PH. but changing lighting is stressful too. Try and zero in on 6.5

Could any of this be explained by the roots being too cold as the floor is concrete?

Are you spraying them down with the mighty wash while the lights are on?

If you spray your plants down, it should be done when it's dark if possible or right before the lights turn off.
What's the PH of the spray you are hitting them daily with?

The only time I spray the leaves is with mighty wash and I move them out of the lights and let them dry before I place them back under the lights.