3 Week Old Sick Seedlings? Spots and Droopy/Crisp Leaves. Tried to Self Diagnose!HELP

I have 2 auto feminized plants, dinafem fruit and original amnesia. I have 2 feminized plants, samsara el aquimista and barneys farm pineapple chunk.
The two autoflowers are doing very well without many spots on leaves, problems. The pineapple chunk has little brown spots on the leaves and it started with the lower leaves and is proceeding to the top ones. Lower ones are sort of crisp and droopy. The Samsara has lighter green spots on the leaves but overall doing okay.
Temperature is about 72 degrees with the lights on and about 60-65 without. I have seen gnats in my growbox so I have made a home remedy (apple vinegar and dawn soap) trap to hopefully kill them off. The plants on in FFOF with a 20% mix of perlite. I have used 1/4 Strength of Fox Farms Big Bloom about 2 times with watering in between feedings. After noticing spots and whatnot I stopped feeding and have used water since. I am using water from a local spring water company who sells the same water in bottles. I drink it and I think its some good tasting water Lol. The Box was in outside in an enclosed area but I'm planning on moving it inside due to the lower temperatures quickly arriving. I am also using 8 23 watt 5000k CFLs for the 4 girls. I have 2 pc fans for intake and one for exhaust. I also have one hooked up inside blowing on the plants/lights. Pics of the plants are below. PLEASE GIVE ME FEEDBACK SINCE I HAVE NOT BEEN ABLE TO SELF DIAGNOSE THEM!
Samsara El Aquimista http://gyazo.com/064e8627afc2a1c8cbf9fec9572fec4a

Dinafem Fruit http://gyazo.com/a3e8aee2ac1b22c4602afab6003870dd

Barneys Farm Pineapple Chunk http://gyazo.com/86a22b1868bc0dfbfe2b383a5e279dea

http://gyazo.com/31b2e2db037b505aef567d7bbdf105aa

Dinafem Original Amnesia
http://gyazo.com/2bcf72a862aeef33c29e094a647a1763

Overview of box.
http://gyazo.com/38ae3e4702dd0b92eb01e0759ee88a96

THANK YOU!

Bump.. No one wants to help a beginner? Would be appreciated greatlty!

Epsom salts. About a tablespoon per gallon. Sounds like a calcium and/or magnesium deficiency. Thank you for holding your feeding. But feed again at 1/2 strength followed by the two waterings and see what happens. A touch of unsulphured molasses might perk them all up as well.



View attachment 2337031

So the next watering just feed with big bloom and growbig? I've only used big bloom so far but I know the fox farms nutrient guide says to start using the grow box along with the big bloom. I am also letting them dry out for the next day or two to kill the larva of the gnats and to have time to kill the adults. The next watering I do will probaly be with a mix of peroxide to kill the larva. I also plan on putting sand on top of the soil. Do you think miracle grow perlite would do a good job as long as I run water over it first to try to get rid of most of the chemicals etc.?

Thanks for your help much Hotrodharley, did you take a look at those pictures also? I'm thinking magnesium or phosphate/phosphorus and magnesium.

Those plants are ready to be moved to a bigger home. Transplant to the pot you plan to finish in...up the perlite to about 30% resume feeding at 1/4 strength after about 2 weeks. They should be fine.

Thanks I GROW, it's appreciated. I plan on moving them all to their own 2 gallon pots. Once the autos are done I'll transplant the other 2 into 3 or 4 gallons for optimum yield. Again thanks man.

No problem...That looks to me like the only problem you have. They look good all around as far as nutes and such. The medium you are using has everything in it they will need for a good 2-3 weeks. You may want to check out the new FF Boomerang comeback formula. My hydro store just gave me a sample. I am guessing you have a FF distributor near you. Good Luck

I am probaly just going to stick to the FF trio this go around. But it just scares me to see the leaves have spots on them and the Pineapple Chunk has multiple leaves with brown spots and they're droopy. I'll let you guys know how it goes in the next couple of days. Thanks!

Are they flowering at 4"? What is the light period you crazy son of a bitch..

Like I said I have 2 feminized autoflowers, so yes the one has already started to flower and the other one is just beginning to. It's on 18/6 you crazy son of a bitch... lol just fucking with you

Transplanted today into 1 gallon pots im pretty sure. Root growth on pineapple chunk is very weak and she is definately the weakling of the bunch. Don't know if she'll thrive like the others.