could you guys tell me how to fix this problem

5th week flowering been having problems with plants for a while but their still holding up got 3 weeks left just recently added cal-mag hopefully it helps but i would like some advice

(PLEASE rotate the pics!!!) You did right. It kinda looks like an Mg def going on. Kinda hard to tell, tho 'cuz it's pretty early in the onset if it is a deficiency. Keep an eye on them.

i dont know why the picture post like this they show up the proper way on my computer but when i upload them they come in sideways also i had tons of leaves die already so hopefully the cal-mag works

the picks are really yellow, but yes it looks like Mg def, check the ph of the soil or nutes, if this is lower than about 5.4 it could be a mg lock out, if the ph is ok then the cal mag might work,and it will help if you have a nitrogen deficiency, if the pH is too acid and the deficiency is caused by a lock out then adding more nutes, cal mag included will only make the problem worse, in which case i would flush the plants with plain water, then watch them, and maybe feed dilute nutes say e.c of <0.5 (250ppm). but check that ph first. good luck.

i'm doing hydro so ph is about 5.5-6.0 i've tried flushing before seemed the leaves started to turn yellow quicker i'm just hoping the one will survive the these next 4 weeks i know the other to will

You'll get better pics if you turn your hps off when you take them. It'd help a lot. I would have so say if none of the above worked you might be starving them of nitrogen. The buds are soaking that shit out of your leaves right now, so you might try bumping that a little. GL