u/Dummyproofit4me-4151

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Any idea how I can save these beautiful babies,they are autos,been on 24/7 light for about 45days now,starting to bud a little,but I noticed the yellowing,an dead tips,I use carolina organic dirt,from lowes,along with kow killer fert,I also use grow well proven organics for nutes,I water twice a week,with very clean filtered walmart 4ppm,5.5 pH, please can anyome tell me what im doing wrong,I had a fan on low for awhile,but it felt like it was destroying them,idk its my 2nd grow,last year I onky grew 1,got about a quarter out of it,any tips are greatly appreciated,thanks in advance! Have a dope day ✌️

Any tips on how I can fix this? They are autos,been on 24/7 light for about 40 days now,carolina organic dirt,with kow killer fertilizer,grow well provek organics nutes,everything has been fully organic,I water twice a week or when the soil feels dry,but yet still have discolored leaves an dead leaves,HELPPPPPP