Tips have little red dots. Hydrophonics 500 ppm 3rd week. tripart grow 1ml/l cal mag 0.5 ml per litre. watr temp 21C, box temp 20C hum 50% what can be the problem? thanks
well the only cause i see to get burnt tips is ,
your nitrogen is to high for this stage of grow,
other possibility is they are close to the ground and they got some feedingsolution on the leaves.