freind gave me a few plants, think i need help! (pic's inside)

Overall they were very healthy when i got them, nice and dark green. I've noticed that they are getting lighter now and also the tips and edges of the leaves are turning brown. Could this be from lack of nutes or water? Also the containers dont seem to be deep enough, it seems to me anyway. And on top of that there are no drainage holes. I'm using 4, 27 watt 5000k florensents. The plants are about 4 months old, and im not sure if they attempted to flower them before they gave them to me. Also before they gave them to me they chopped off like the top foot of the plant, could this shock the plant so much that the leaves would wilt? Thank you for any help you might be able to give me

looks like the START of nute burn,,, When your leafs are really Dark like yours its a sign of too much Nitrogen , I would just give a flush and only give ph water for week or two . Looks like you going to fix the problem before it gets any worse

hmm, im guessing i should drill a few holes in the pots, right now they do not have drain holes. . . so to flush i just put more water then normal and let it drain out right? pretty new to this, lol

thanks

Yeah, you definitely want drainage holes. It does look like you are overfertilizing and also might be getting Magnesium lockout due to pH being too low (under 6.5). The yellowing & browning on the edges as well as the "cupping" of the leaves that you can see in your picture #3 is a sign of Mg deficiency. Flushing will help with both of those problems.

To flush you need to run water equal to 3x the size of the pot. So if you have a 2 gallon pot, you need to run 6 gallons of water through it to flush it. After you flush just water with pH 6.5 - 6.8 water for a couple of waterings. See how they look after that, but you should be able to go back to your regular feeding cycle, just don't feed as much as you have been.

Also if those are just Compact Fluorescent lightbulbs in those silver hoods, you should move them closer to the plants. Fluorescents shouldn't get very hot and they don't penetrate very far, so if you don't have them close your plants will start stretching out to reach the light. If you can hold your hand at plant level under the light for one minute and not have it get hot then it is OK to put it that close to the plants. Sometimes fluorescents can be placed as close as 1-2 inches away if they are not too hot. Aim for as close as you can get them without it being too hot.

very imformative site here, thanks for the help. I am going to drill the holes and start flushing, I am not sure what nutes i should be using but that shouldn't be a problem the next few weeks. I hear that mircle grow should not be used at all. I need to get to the store and take another look at what is out there.

thanks again for the help