3 weeks plants, Leaf curling down...PLEASE HELP!!!!!

PLEEEASSSEEE HELPPP!!!!

I'm doing my first DWC system, but after 3 great weeks, the leafs of my plant had been curling down. I'm pusing a cheese and white rino seeds.
with:

• 90w ufo led (18 hours)
• 20 lts water reservoir
• 2 air stones with one air pump working for 15 minutes every hour.
• I've been using the blom and grow nutrients from General Organics and I've been using the folloing chart:
  • http://www.eurohydro.com/publicatio...s)/APPLICATION CHART/GB/CHART-GAMME-GO-GB.pdf
• Also use a water filter to remove the clorhine and at the same time I use the water after 5 days.
• I use the "aquarium sera ph down" to keep my ph between 5.5 and 6.5 (I check it daily).

last wendsday I took them out of the water couse the were curling down and I read that it was happening becouse I put them on the water after almost 2 weeks and they where to young. I put some water on them just in case on friday and today, but they look the same to me and they stop growing...

this are the pictures, i remove the water pump couse I was cleaning but the system is the same.....

cut back to 1/4 strength, imo

Ahh an the smaller plant look sfunny couse the seed still stuck to the smaller leafs....

WOW those plants are 3 weeks. it looks like 5 days max. well i would give it no nuts at all NONE what so ever. It is to young even though it is 3 weeks, it looks YOUNG as hell. so no nutes just give her straight water and nothing else till u get some more growth and then slowly add nuts like 1/4 strength and slowly increase. what is the ph of your water and ppm/ec of your water? and what is the res temp?

No as we said last week when you had them in a pool of water, they are overwatered badly thats means no recovery for seedlings that damaged at that age. Root system would be ratshit.

Hey Guys, after 48 hours out of the water res. they are looking better. The smaller one is still weak but the other one looks better. The lower leafs are still down, but the other ones are curling up....