6th week into flowering def or burn

gslimm said:

well first of all i've had a nitrogen/magesium problem for the longest,but everytime i think ,i'm on the right track,something else happens......I have (25 )white widows,(5)shiva shunks..I'm using (3)600 watt hps,room temp 72-78f,humidity 45-50,water temp 72f....40 gallon reservoir,flora nova bloom (689)ppms,liquid koolbloom (1)tsp per gal,liquid karma 10ml per gal...I'm not sure but,i think my ppms are too high....Can someone please,give me some advice..Sorry for the long post,just wanted to provide,all the info i can...

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