Tips of my plant are yellowing

[Trillskrilla]

I went to my local grow store and told them my tips are starting to yellow and they suggested cal mag so now I'm on the second week using that and a new led light. The tips are still yellow but there's now some beautiful bud sites. there are about 10 colas and 5 of them are towards the bottom and aren't looking like the other 5 which are doing quite well I'm just wondering if I should chop them to put more energy to the top and should I continue with the cal mag every week since I've now done it for 2 weeks

[Keeno]

A picture would give us a better idea of what's going on.

[GMO]

pics are always best, but also wonder if youve fed any PK ?

[2-Scoops]

Just a guess, possibility or whatever, but if tips are turning necrotic and dying on leaves and plant is lightening up in colour it could possibly be lockout caused by overferting, basically too much feed in your medium causing lockout, Go steady on your feeds dont go mad is what im saying. As the guys have said pictures paint a 1000 words though.