whats wrong with my leafs? HELP!!!! **pics**

sooooooooo. a couple of weeks ago i posted some pics of my leafs coz i was worried. they didnt seem that bad and i was told to stop worrying. when i got back from work today i went to check on my plant and the leafs seem to be drying out or something they seem to be turning to dust or something they are dead dry to touch, it only seems to be the bottom leafs at the min but i dont want it spreading. does anyone know what this could be and how to solve it? it is under a 200w envirolite with a red pigment. i changed to 12/12 a couple of days ago, i am using canna profesional soil and ionic nutes from grotec. i water every 3 days or so nutes then plain water, nutes, plain water, nutes ect.

why u feeding nuits then water, nuits then water again. maybe its a heat issue u have. got any pics m8?

haveing a few problems...... pics later

im watering it with water then 3 days later water with nutes then 3 days later water it with just water again ect the temp is only 25 oC

yes but why? unless u had built up salts etc i'd understand.

Isn't there an entire section above this one devoted too GROWING MARIJUANA......or did they change the "Toke And Talk" section to troubleshooting for NOOBS?

soz but no 1 was viewing plant problems so i decided to stick it here instead...... anyway i am toking at the min and i am talking so i dont see why i cant put it here.

what do u mean y? i got the impression thats how to water them coz i dont want nute burn, how do you water yours bud smoker?

any other answers? plz help. here r the pics..................................... finaly