rust spots after changeing to led

[bufdixmoore]

just upgraded lites to 800w led last night this morrning i checked now i have a few brown tips and a couple nice sized rust spots and about a 8degree temp drop for upper to lower 70s
plants are about 5 week old
i never checked ph (didnt know to. but i got a meter coming today i hope)
yes i went into this very unpaired but not doing bad i think hope pray
so i need a lot of help

 

[MeefChief]

Photos would definitely help, but it sounds like a possible calcium deficiency.

 

[bufdixmoore]

thanx for the info cheif working on photos havent been able to find anything on my computer since the windows 10 upgrade thats the same thought i had any suggestions on how to fix it

 

[MyHighness]

Take cal-mag supplement. After few feeds with added cal-mag the spots will stop appearing but the appeared ones will be there with you till the end.