Whats wrong with my plants in flowering stage?

Been having these issues 5 weeks into flowering. Just recently I have been giving them just water after a flush 2 weeks back. they started to what seemed to be burning on the leaves closest to the lights on the colas. I raised the lights which are CFL's and then recently it has spread and other leaves are yellowing. RH is about 45- 50% and temp at 80 to 85 F. Grown in ocean forest and 1 gallon containers (small I know I water them every other day) and I use a 6.5 ph conditioner normally used for aquariums. When I did use nutes it was the foxfarm tiger bloom, Grow Big, and big bloom. There are 3 females from the 6 I germinated. I have not had any problems really since I grown them from seedlings. I feel I'm so close and would hate to fail now (being my first grow). Thanks in advance!

Have you checked the ppm and ph of the runoff water?

looks like the foxfarm load of people had the same problem personaly i think its shit

Too much P too early.

How are you feeding the FF products?

Ok, so I didn't want to reply until I was ready to feed them and give run off PH. So I decided to feed them nutrients again since it was obvious they were deficient. So I fed them a 1/4 of what foxfarm suggests like I always have in the past with them. I'm hoping going from a flush with watering with no nutes for 2 weeks then back on the nutes again won't stress them. The PH of the run off is still roughly 6.5 just as it went in. PPM I do not have a way to measure for this crop ( will get one next crop). I mix the nutrients in a 1 gallon container of water. then top feed the soil. Have not had any issues like this before the flush besides bottom leaves turning yellow and falling off ( I'm fairly certain this is because they don't get any light due to the canopy leaves. ( I'll admit it, I was scared to lollipop them at all). So was I right by feeding them nutes again? and if so should I flush again when it looks like they are close to harvest? Or should I just continue to give them pure water? Also from the pictures how far away do you think they are from harvest? ( I want to harvest them when 3/4 the tricomes are amber and cloudy Max thc production window)

What FF nutes are you top dressing? Are you atleast half way through flower?

i'd flush it out real good. and hit it with some cal/mg and add some N. they look like they need some food. maybe next time use bigger pots?