first week of flowering SLH and Nevilles hazy hybrid..bottom leaves dying. first time

i have seen this is an issue before, i was told its either due to one of three things. temp/humidty, ventilation/circulation or distance from light. i noticed some stretch on them today so i moved them ALL 19 inches from the light which is a 1000whps light.. my temps are 75-80 but my humidty is 10% (just foudn that out). i have one BIG 3 ft by 3ft fan sucking in air from a tube thats from the outisde ground area (i grow in the basement, my intake tube is 4 inches off the ground, nice gold air.) and i have a 3 inch exhaust fan (80cfm) one. again there were ZERO issues in veg with this SAME circulation setup

now heres where the problem solving starts. this room was the SAME room i used for vegging, i kept the light on 24 hours and vegged with NO issues in the EXACT SAME SETUP(1000w mh) BUT heres what i believe the problem is.

at night when the light goes off, a lil space heater turns on that keeps the room right around 75-80. i had said heater on the floor with my plants, before i moved them today. i BELIEVE the issue was because they were on the floor where the heat source was, it was probally roasting them combined with the low humidity. ive only had them in flowering for a WEEK thus far and for the WHOLE time prior to this, they were doing fine in veg minus over fert from my newb ways. this issue just arised. no ferts yet minus this lil blue poweder i got off ebay till my REAL big bud shows up, but i BARLEY put any in the water, under 100ppm. waters always phd down with white vinegar to 6.0-6.7

the leaves are shriveling up, some have literally dried to the crumpling point. any thoughts? i changed a LOT of variable tonight so hopefully in the next few days, this mayhem stops lol. ANY advice is appreciated.

my setup has five plants right now btw. and the mystery fert powder is not the culprit as i JUST put another SLH plant in from veg which i took clones of 3 days after i started the flowering process for the others, and this plant has NEVER seen the blue powder ferts and is starting to show similar signs.

Posting some pics would definately help here. When you say "shriveling up", do you mean starting at the tips of the leaves? Are they the leaves on the top canopy near the light source or lower nodes? Is there any yellowing, if so is it from the tips in/out?, etc...

Not sure what's in your mystery powder but some sort of ingredient list would help. They'll definately need some kind of nutrients and that might not be the right source. The humidity is definately way too low so you might concider buying a cheap humidifier.

Just fill in a little more info and the pro's here will really help knock your problem out. I grew SLH a couple times and if I saw some pics I could tell you if I've dealt with the problem before.

some not so great pics. the nutirent list is actually literally identical to big bud heres its FULL list. like i said, i dont believe its the culprit cause the one plant thats been in there for two days is showing similar signs. i JUST watered the entire floor of the room (concrete, wont cause mold/mildew) and would REALLY like to get this situation figured out before my LSD plant goes into flowering room and suffers the same fate.

Easily mixes with water, 100% water soluble with added micro nutrients
4% nitrogen
18% Phosphate
38% Potash

Derived From:
Potassium Nitrate, Potassium Phosphate, Muriate of Potash Ammonium Phosphate, Potassium Sulfate,
Magnesium Sulfate, Sodium Borate, Copper Sulfate,
Iron DTPA, Molybdic Acid,
Manganese Sulfate, & Zinc Sulfate,​

and they are yellowing from the BOTTOM upwards. the fan leaves right now, but a leaf or two towards the bottom where the node meets the stem are starting to behave the same way.

curing up like theyre trying to make a fist. its not nute burn tho, ive had that before and like said, some of the leaves are bone dry wilted.

My only question would be, what is your runoff ph? That definitely looks like a ph imbalance which is locking out the absorption of vital nutes (or over feeding others). How do you know to adjust the ph to 6-6.7? I would assess your runoff ph and adjust with a flush twice the volume of the pot, then feed with 1/4 strength nutes. Make sure to check your ph after the nutes are added too.

You may look into some flowering nutes with cal/mag in them too.

i also have bud candy, will that help any?

just watered them today with my mystery powder and some bud candy. ppms were right around 600 i believe. 6.6 ph level

The ppm is probably good but what is the PH of the water that runs out the bottom of your pot after watering??? That's the majic number that will tell you what the actual PH is after your water mixes with the grow medium. If you put 6.5 ph'd water in and your getting 7.5 out, that means your soil is too acidic and you need to drop the ph of the water going in to adjust. Your ph should be around 6.5 for soil.

If I were you I would adjust my water to 6.5 without nutes and flush the pot with two times it's volume. So if you have a three gallon pot you should run 6 gallons of ph adjusted water through it. Then on the last gallon check the ph of the water that comes out the bottom. If it reads around 6.5 then your ph is pretty good, if it's closer to 6 then run a slightly higher ph next time you water, and vice versa...

Do you have a PH pen? If not, how are you determining that your water going in is around 6-6.6?

I'm a big fan of the advanced nutrients line but the bud candy is designed to increase the aroma and flavor of the bud, it isn't a substitute for regular feedings. Same with the big bud. If you have a little extra cash (around $40-$50 for the pair) pick up some Bloom A and B, it's two products you mix together for feeding durring flower and should cover most of your nutrient needs. I like Advanced Nutes because they don't change the ph, I can't say the same for your blue power. Then when you start your next grow, get some Grow A and B for vegging.

Just remember, you can't reverse the damage that has been done, you can only hope to solve the problem so that the new growth will be healthy and deliver you some sexy buds.

i have a ph and ppm meter. the problem is i use miracle moisture control soil so even with heavy watering id need a LOT of water to get a run off ph. i have them in 3 gallons of soil

i know its not a good reading but if i stick my PH meter in the soii it reads 7.0. does this help at all in any way shape or form?

i also put some lime on the top of the soil.

Those soil meters never work for me and lime will increase Ph. Right now you don't know if it's too high or too low. Your first mistake was using MG. Marijuana likes a dry period between waterings. Is a transplant possible? How big are they? If not all you can do is find out what the true ph is and adjust it with waterings but without proper drainage you'll be susceptible to nute lock from salt build up.