Burnt tips and edges= nute burn. Flush then re pot and try to use flowering nutes at this stage not an all round fert that your using. Causes could be at this stage after all the feeding and letting the pots dry too much leads to salt/nute burn.
Try sphagnum peat/coco coir mixed with 25% perlite. It should be almost inert after a couple weeks then you use high quality hydro nutes, no extras or magic sauces.
These cheap fans wont be enough for a 600 in cooltube . Try to get a centrifigal fan something like this--
What length of ducting will it be pushing/pulling thru? any bends in the ducting?
Sounds like its fucked. When you burn the shade leaves off you are taking away the 'solar panels' that draw in the energy, without them you will get a very light fluffy harvest. The burnt tips is also a very bad sign for the quality of the finished product.
Its stress/shock twice. You shocked them with a rough transplant( prob not root bound enough) then you compounded the problem by putting them under the new more intense light.. Put them back under the cfl ,stop watering and wait for recovery.
It stress/shock twice. You shocked them with a rough transplant( prob not root bound enough) then you compounded the problem by sticking them under the much bigger 600watter. Put them back under the cfl and no watering unless they perk up and the pots become light to lift. When plants are sick...
Thats because your a muppet with no idea. If you worked in a hydro shop for 10 years fuck you must have dribbled a lot of bullshit to your poor unsuspecting customers needing good advice. You dead set cockhead.
Transplant stress. When you do a double transplant and stick it under a big 600watter it will stress /droop. Raise the light stop watering/feeding and move the plant to the side until it perks up. Should be ok in a week or so.
Not true . I grow large healthy plants green from top to bottom at the end with no ph adjustment, nutrient wands etc. I use canna terra coco with terra vega and flores. Very easy .
With standard soil and hydro you need the ph adjust.
Soil in general doesnt work for indoor dope growing unless you are very experienced and dialed in. I had the same issues as you until the bloke at the hydro shop put me onto canna pro coco mix used with canna terra vega and flores. No ph adjustment and very easy to manage vega in veg and flores...
You should have trusted your judgement. Looking at this soil it looks rubbish and not suitable for growing healthy plants.
Can you get some quality coco made for growing dope?
The reason for this is the medium they are in, not suitable for seedlings that have just germinated, usually too hot and plants these size need little to no nutes just and an inert medium. Jiffy pellets are good at this stage.
I doubt they will improve so i would start again.
Nute burn. i think the dirt you are using has enough food for a seedling and adding more has burnt the little thing. One feed is enough to burn a small plant .