What type of medium; soil or hydro? Coco What brand and type of soil? Coco Indoors or outdoors? indoors What strain? White Russian, Strawberry Cough, Mystery Strain??? How old are the plants? 5 weeks What type of lights and how many watts? 600 - 1200w How far from the lights? 16'' What is your watering frequency and source of water? 2-3 days, RO water What, how much and when was it fed? NPK? Fox Farms Trio w/ Sugar daddy and CalMag. What is the medium/runoff pH and PPM if in hydro? 6.2 ph and 400ppm What are the temps and humidity in the room? 78-81 humidity under 30% always What size pots? 5 gallon Any bugs? Look real close. none Any other pertinent info? A timer broke 3 weeks back and allow the pump to dump my whole resivor into the plants. I caught it about 4 hours after it happened and flushed the plants. I gave them 3 days to dry out and recover before giving them 1/4 nuts. 2 days later I water and then 2 days later 1/2 nuts etc etc till back to normal. Well the last 3 to 5 days (3 weeks since the pump broke) all the plants get this terrible yellowing at the tips. And I have one Mystery strain that looks like death... I have 2 pictures that don't help much but gives you some idea. I'm trying to get my buddies camera so I can take more with more clarity.