I need help A.S.A.P

[HighLife420AlwaysBlaze]

What's up everybody I'm new to this site and growing. I have a month in a half old plant in the vegetation stage. I pruned the 1st 2nd & 3rd set of leaves a week ago my plant seemed to be doing fine. I also bought the flora trio and applied the required amount to plant. It began to show brown edges on some of the leaves on my plant. I noticed the was dry I am using burpees garden coir so I flushed my plant because I thought it was nitrogen toxicity.My top leaves look like hard shell tacos and feel dry my soil is still wet I even just bought a new hps light and my girls are sick please somebody help me. #NebulaHaze NebulaHaze I can upload pictures if needed

[OzBud]

pictures would help a lot.

[OzBud]

temps?
humidity?
pH of nute mix when watering?
pH of runoff water?

[OzBud]

What wattage HPS light? How far away from your plants is it?

[HighLife420AlwaysBlaze]

I have both 600W Hps lights for veg. and flower and the light is now about 4 ft. from the plants. I do not have a grow tent so I'm growing in a closet. I don't know how to check ph run off and temp is 78 degrees.

[OzBud]

600W hps should generally be about 18" away. Is your plant stretching with lots of spaces between the nodes?

[HighLife420AlwaysBlaze]

I also have lights set to a 18/6 light schedule
OzBud

[HighLife420AlwaysBlaze]

[HighLife420AlwaysBlaze]

I also LST or tried but this is now

[HighLife420AlwaysBlaze]

Yes they are stretching.