Nutrient Solution Burn -Help please

[DrZeus]

Well 6 days have pass since my Soil flush , and although old burnings leaves seem to get better , new ones appear in younger leaves.(off course not as big as the previous ones- but still they have this yellowish ending at the edges and some little burning at the end) Is this normal ? did the soil flush failed to work ? will I be needing to do a new one ? and finally how serious IS after all a nutrient burn ?
As for the soil flush i only used 3 bottles (1,5 lt) o mineral water in each plant , so maybe it wasn't enough , I don't know... (2 plants 4 weeks + 2 days old in vegetative period , organic soil under an 400w HPS. Used a nut only once then a nut burning came up , did a soil flush and been watering with tap water over since)
Since i am a begginer a get very anxious over my plants... Appreciate any help , thanx.

[SmknVTEC]

Do you know the pH?
Looks like burn and the top is the new growth and that looks green. Did your nutes have magnesium in them. Almost looks like magnesium but I think it is fert burn. Flush once more the next time they need water and see.

[motorheed]

flush again ASAP ,use 3 x's amount of plant pots ie; 11 litre pots then flush with 33 litres of water etc............you wont cure the nute burn but only stop it,leaves will die but wait till 50%+ damaged before taking off dead leaves.

4 weeks old , what amounts of nutes you been using,i know your using water now but what amount of feed & how often did you feed them?
reason i ask is your soil should have enough npk in it so you should not need to feed any nutrients for at least 3-4 weeks....

the good news is they look healthy enough & with being in veggie stage a little selective pruning,get your feeding schedule right & your away bud

[DrZeus]

Well it turned out it was a Magnesium deficiency. I started watering with mineral water + a suplementery nut with cal , mag ect ect, 2 days ago. I think they look better. I removed the dead leafs. As for the NPK nut , i used it only once a week before the first "damaged leaf apear" and olaso in a reduced quantity so i guess the hole nutricient burn was a false alarm. What do you think ?

[SmknVTEC]

Well if they got better with magnesium then thats probably it. Hard to know for sure and I still don't know run-off pH.