Help with sativa's with 5.5' heighth

Well tested my tap water at 6.8ph so shouldn't be nite lock out,right?I flushed half strength FF sledgehammer then water,TDS came down.my nutes solution all dirty dozen and 6 week into flower my nite solution ppm is 1150.Is this ok.This was a bagseed trial in 12 x 6 room with 5.5' ceilings.Any ideas,next grow is 5 Durban Poison 5 sour diesel so I know I must control height.oh 400hps,marshydro ts1000& tsw 2000,105 cfl supplemental light,in FF dirt+perlite

Shanepr1313 said:

Well tested my tap water at 6.8ph so shouldn't be nite lock out,right?I flushed half strength FF sledgehammer then water,TDS came down.my nutes solution all dirty dozen and 6 week into flower my nite solution ppm is 1150.Is this ok.This was a bagseed trial in 12 x 6 room with 5.5' ceilings.Any ideas,next grow is 5 Durban Poison 5 sour diesel so I know I must control height.oh 400hps,marshydro ts1000& tsw 2000,105 cfl supplemental light,in FF dirt+perlite

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I think folks might be confused what the question is?

What I mean is I'm trying 5 Durban Poison& 5 soir diesel plus few more in a 6x12x5.5 height,I pH,ppm,ec,monitor everything and adding a 315 cmh as well,any ideas on growing this amount under my lights,sativa's too or 100%-90% sativa's so they will get tall,will the cmh keep stretching down and do I have enough light?400watts + for hps+marshy-1000&mh2000tsw=450watts + 400hps+105 cfl side light and a 30 watt bulb for it.i need to fill a 5 x 5 with a month veg(maybe less with Coco,I'm using 5gal. bags,ffof+happy frog/perlite/Coco,and cheaper organic soils,so should be no feed til week 3,right
Or should I spread the 125,000 lumens more evenly,help I can't think,I'm stoned!