Help. Browning/Yellowing Leaf Tips!

ANYBODY THAT UNDERSTANDS, PLEASE HELP.
LEAF TIPS ARE TURNING YELLOW AND BROWN! IDK Y.

One week ago i changed the water/nute solution. I fed the girls the gro, micro, bloom, and kool bloom but all at half dose. So i don't think i'm overfeeding. Its either deficit, which i'll change solyion after work today, or a temperature thing. Please help!!!!!!!!!!!!!!!!!!!!! Thanks!!!!!!!!!!!!!!!!!!!

View attachment 968869
View attachment 968870
View attachment 968871
View attachment 968872

CHIILL it might be a little shock changing nutes

Your plants look healthy as fuck man. If you wanna try to get rid of the tip burn though try some calmag plus. Heres what its for:
CAL-MAG Plus ™ Helps Prevent
• Blossom end rot in tomatoes and peppers
• Tip burn in lettuce and cabbage
• Dry and withered flower and fruit sets
• Interveinal chlorosis
• Stunted growth rates
• Upward leaf curl

If your gonna use calmag plus though you should drop the GH Grow formula and use the lucas formula since calmag contains nitrogen you dont want all the nitrogen from the grow formula as well. And you dont need it, I use GH micro, bloom, calmag, and koolbloom with excellent results.

THANKS GUYS!

I'm kinda new at this, so your help is appreciated. I will continue to hope for success!

You`r over feeding, lay off the nutes a bit.

Just look at the purple stems and the darker shaded fanleaves. Not even mentioning the obvious, tip burn.

Little bit of a miswording/interpretation. When i said i changed nutes i meant just changed mixture strength or solution. If you're familiar with the GH Flora series feeding schedule, it says for transition between grow and bllom you use 10ml Florogrow, 10 ml Floramicro, 10 ml Florabloom, and 2.5ml KoolBloom.

Well i used half of what was instructed, and....................a week later............. yellow tips.

I don't think its nute burn because the nute level would have dropped in one week and it would've happened right away. Unless its just mineral build up.....IDK...