Nute Burn?!

so yesterday i fed my plants before i went to monster trucks and when i woke up this morning i had some pretty bad yellowing im pretty sure its nute burn because i feed it two days in a row but i just wanted to make sure maybe its from something else.
my setup i had a 125 watt cfl for the first 3 weeks from seed. a few days ago i put them under the 1000 watt mh and the first couple of days liked it started to see them reaching for the light but i dont think its heat burn because the tallest one is 48 inch from top of plant which is a pretty safe distance. my humidty is usally kept around 20 to 30% accept yesterday i forgot some wet towles in the room and the humidty went up to 70 in the closet and 60 in the room that probably wasnt good for them either but im droping it down to 20% now im runing an 18/6 light cycle and my ph in my water is 6.5. this morning when i say the brown i instantly flushed with fresh water and im pretty sure that will be all thats needed and restore the room back to the rigth humidity and a few days of recovery she will pull back threw ... i just wanted to make sure that thats what it was and thats what i should have done if anyone knows anything else i can do to help it threw its recover please post. thank you for any input ++rep for any good advice.. pics arnt working ill try later

without seeing picture of them... yea.. i would guess your right... nute burn sounds like its the problem.. flush the plants well with a 1/4 strength nute solution.. you actually remove more build up and salts flushing with 1/4 strength solution than you do with plain water... the next 1 or 2 feedings just use plain water... when you start feeding the nutes again start with a 1/4 strength solution and increase from there... everything else seems to be good in your room... just give them time to recoup and your babies should be just fine!!

here the pics im almost 100 percent it was the light being to hot with no fan on it because the first plant is totally dead and turned brown ... but let me know any info is good info

well...it could be heat, so add a fan , and if it is nute burn, flush and let sit til dry, then slowly introduce the nutes back.

yeah i did that i added the fan and did the flush and added some nutes today differnt kind then normal iv been having trouble with what the guy at the hydro store gave me