HELP!Burnt tips...Nute burn?

This is my first grow so im still trying to get as much advice/info as I can get....Heres the pics..


Also for feeding how should I give them there nutes?...On dry soil then water it down or mix it with water...Which is the best and what would you prefer??

Also growing Blackberry
Day 9 of Flowering...

Fox farm soil...Pur Vida Bloom

temp issues ???

Temp is kept between 78-85 with the lights on...No lights...65-70

That's it FFOFI used to love it grew with it for 4 yearsI've had low ph & burn issues so I started over 3x in last 6 months nothing but troubleI add lime by the cup and it didn't help with low phI going back to growing in rock woolStarted it TodayI have my last grow on video I just haven't posted it to u-tube yet here my first grow with it 07
http://www.youtube.com/watch?v=-nhoUIIWnqY

I should post my last grow with ffof but it don't look pretty and I'm still pissed offYour nutrient's I'm not familiar with~

Let me recorrect my self i used 1 bag of FFOF and mixed it with Sunshine Advanced Growing Mix #4.....Wow so what other soil would you recommend?

I saw that video already by the way lol...

Yeah I post it every chance I getI don't know any more a lot of growers love ffof or sunshine mixes they think their holy gospelThey act like their working for fox farm they defend it to the deathI'm saying just changed~my had a lot of trigs in it I don't remember trigs in it when it was good not that's trig's are bad just that its been changedI was going to post my video of my last grow soon as I decide on the musicI'm going to go with all rock wool and advance nutrients sensi grow and bloom the liter of grow will last as long as 4 liters of bloom if that's not enough I have plenty ff nutrients~The rock wool you use just like dirt but water like hydro at 5.6-5.8 before my state went legit I couldn't get good dirt then it went legal all the grow shops open up so I had to try ffof cuz all the hypeYou probably seen these pic's before sorry I don't work so I got do something

Thanks man....I also got the blackberry running under 1000w HPS do you think the light is too much???I also can dim it down to 750w and 500w..

How big is the room? and how far away do you have the light? How many plants are under the 1000w?