For one gotta get rid of that tin foil. It sux as a reflector and it could create hot spots therefore burning your plant, either use white paint or reflective mylar. With one plant you may be able to get away with buying on of those helium balloons and cut it open and its mylar reflective mylar inside. Also your plant looks a little hungry, it looks like it needs a little of everything, NPK and cal/mag. The light green fading looks to me like a Nitrogen def and the brown spots are hard to tell but that may be cal/mag. Try to keep the temps down too 89 is a little high I think, 85 is ok. And if that's soil try to get the ph up to 6.6 to 6.8 to maximize nutrient absorbtion. When you test the PPMs test the water first. 200ppms is good for now but make sure its 200 ppms of feed not including the water ppms. I hope that helps. Im still new to this too but ive done a ton of research and I asked plenty of questions on here and the good people of the RIU community helped me out. Also next time you have a question about your plant the more information you give about your grow the better we will be able to help you solve a problem (lighting, nutes, medium, strain, age, etc.) Good luck my friend
ok Thanks!
My water is about 85 ppm so i gues its only about 115 ppm of nutriant.
Lamp is 250 W MH at a distance of 1 foot (33 cm).
Nutes are General Hydrophonics 3 part kit and super thrive.
Medium is water (bubbler).
Watertemp are about 24 *c (75 F).
Moisture is about 25- to 30% (100 % in tank lol)
Plant is Northen Lights auto fem from nirvana at day 19.
@pSi007:
it might be moisture/heat as you say...
How do oyu tell the diffrens from overfeeding (burning leaves) and underfeeding (phosforus deficiency)?
Im afraid I'll overfeed the poor thing.
Also i might add that the burned spots feels like a cats toung.
Rought one way and soft the other...
Thx for quick responses! Rep everywhere!