Leaves Turning colour...

[Eyeless]

k i had a major problem with this plant a while back ( i posted on here about it) it's in soil, 500watt, indoor, flowering, nearly 3 mnts old now but the older leaves seem to be turning yellow then brown curling up then dying...new growth is fine however..... i have some pics

This is one of the fan leaves...i cut off most older ones as this happened to them already

and this is one of the lower new growth leaf

i don't know if it's a nute problem or what...the extreme tips of most leaves are either yellow or brown as well...

pls help if possible

 

[Urdedpal]

Don't worry too much about the old growth its been damage already and will die off. As long as the plant looks healthy and the new growth is healthy you are doing fine.