Hi everyone! Im a first time grower and, after lots of trying, im finally in flowering period. Nevertheless, im having a few problems... I have these two Big Band from Kannabia Seed Company, I put them in flowering period two and a half weeks ago, and ive been watering each 5 days or so. They were doing pretty fine till 4 days ago. First i thought i was having some potassium issues, so i put it a potassium and phosphorus organic solution, but they woke up a little bit worse. The tips and edges of the leaves are turning yellow and then they start to wither. Im not sure if it might be a problem of overheating, overwatering or im just using too much nutrients. The other thing is that im also growing another two Pure Ak and they are doing just fine... As for the rest, im working in a 1.4 mts x 80 cms. space with a high pressure sodium lamp of 400 watss. Soil and water PH is measured in 5.5. Also, temperature is never over 27 celsius and humidity is between 45 - 50 %. Hope you can have a look to my pictures and helpme! Thanks!