brown leaf tips, and hydro

first timer trying hydro and dirt.
1000w hps, light temp 70-80, no idea humidity level.
On big plant, tips of leaves just starting to turn brown(only tips at this point). using Sunshine mix #4(transplanted to larger pot a week ago).
small plants not of the same variety.Started in peat pucks and placed in tray of dirt. had powder mildew but treated and retreated a second time.just transplanted into hydroton with some dirt still attached to roots(mostly shaken out.
drip feed 1 gallon an hour. ph 6-6.5
Hydrofuel groei A (3.5-0-3.5) and B(.7-.62-1.9) running 24/7.
water temp 65-70room temp. using bottled water
i just brought ph down to 5.5-6.0 on advice for hydro.
used same nute and ph for a dirt plant, brown tips just started.

Kinda looks like to me you have some insect and nute burn issues. As a general rule it take soil grown plants a bit longer to take the strong nutes. More info and pics would be helpful.

And maybe not insects. Have you splashed any nute solution on those lower leaves?

on ugly plant 2 actually were outside and wasps ate the ugly leaves.
main issue is leaf.
a couple lower more than likely got hit when placing nute drips.
but even on my 4 ft dirt the leafs are turning dead only tips sofar though.