What to do?

Hello, first time growing and ive run into a little problem.
my plants leaves are curling and turning yellow at the end, with a little bit of droopiing.
its in soil, temp is 25 degrees celcius and humidity is at 35%. my water is around 6-6.5 ph
ive givin it some nutriants, says for cuttings and seedlings.
DNF 2 part liquid 2-1-5. i havent givin that much, but ive stopped now.
the strain is the purps and its a clone
its under a 125w CFL which is atleast 6 inches or more from the plant
im not sure if i should flush it? what should i do? any ideas?
for flushing do i just water it with 3 times the container volume then not water it for 3 days? thanks

anyone??
i dont want my plant to die!!

Yikes, I thought mine looked bad :/

What kind of soil is it? What are those yellowish patches on the soil in the picture? How much are you watering it?

those are just parts of soil that arn't wet.
i flushed it last night the best i could, and i think it worked!
i gotta go to work now tho il post pics after.
i was watering it every second day using a tea spoon. i would water it about 5-6 teaspooons every couple days. too little?
now that i flushed the soil when should i start using the nutriants again? it says for seedlings and cuttings and the NPK value is in my first post. thanks!

edit: i dont know what type of soil this is, because i got it in this container from my friend who got it from his friend. for transplanting i have an organic soil with perlite in it.

so this is how my plant looks today after flushing. i talked to my buddy and he and i came to the conclusion i wasn't wattering it enough. does anyone agree? anyone see any underlaying problems i need to take care of?
i cut off all the dead brittle parts of the leaves

Keep on fighting.