VIrus, Bacteria, PEst, Fungus????... it´s Killing all my plants!!! HELP!!! with FOTOS

it starts sudenly and almost all the plants are infected... just the new leafs are afected, old ones remain healthy. The strain is a moby dick. they are now on 6 week, since germination day. the big one is the oldest one its an amesia and was the firt to curl down the leafs. i need Help!!!!!

Holy cow ..how much N you feeding? pH?

i didnt give any kind of nutrients to the small ones! the biggest one sensi-grow 2ml per liter but a long time ago, i stop when i saw the fist symptoms... Ph between 6.3 6.7

Transplant immediately. Overwatered for one. No water except to dampen new soil for a week. Lay off the nutrients a while totally.

It looks like a water issue. Id guess you use tap water and its hard causing problems. Try RO water or a 50/50 mix tap+filter water

i used that same tap water on previsouly other plants and everything was nice.

ventilation? humidity, temperature?

Each strain is different. Is it the same strain? Did you reuse the soil? Or are there nutes in the soil your using? As soon as you add nutes to any hard water you have extremely hard water. Maybe between the nutes and the hard water you came on a little to early to her and she wasnt ready for all that

i am start to think that is a tmv virus!!

ferrazoals, POST all growing details mate, room temp, type of soil, soil ph, how often u water, did u feed the plant with ferts? to my it looks like an over water which lead to a deff, but POST ALL DETAILS !or were al just guessing its to hard mate.

Soil :Atami light Mix (Good enough for the first 3 week of veg) they are now on the 6 week since germination day.
Room Temp: about 28ºCelsius
PH: between 6.3/ 6.7
Watering: 200ml of water on a 3.5l pot ... i just water again when the soil is completly dry.
Never feed the small plants
Relative humidity: 40%
Light: 600w bulb

Old leafs remain healthy, just the new ones start twisting,and drying....
Well i am studing every possible def, or toxicity... maybe zinc def, or calcium both make new leafs curl. But i realy start to think is a virus tmv(tobaco mosaic virus) or hsv(hemp strike virus) ... one of the hsv symtoms is a "wilty wave" aspect of the plant. The only reason i am not sure of that is because of the bottom leafs that remain healthy. i dont no if the virus attack all the plant or just some parts!

Sorry for the english!!! HELPP!!!