guys link from above

Here is a link that might be useful: guys link from above

I checked the pics on the flickr. The foliar symptoms on the younger leaves indicate a plant nutrition disorder and in this case is iron defficiency.You can see that by the characteristic yellowing of the interveinal space while the veins remain green.Actually this kind of deficiency starts on the newer leaves as you mentioned and is very common. The cause of the problem assuming that you are using a balanced nutrient solution can be the raise of the ph of the nutrient solution and the bad aeriation of your roots.I think you are overwatering your plants and your nutrient probably is not very well oxygenated.if your nutrient solution is homemade and thisway we can assume that it is imbalanced, try lowering the percentage of N and P and raise your K percentage.
Anyways since the problem already started and it is this advanced i would recommend a folliar apllication of iron fertilisation.You can find many products for this purpose in market.
I hope my diagnosis is right and helpfull after all.

Thanks for the response. I was so excited to see someone giving me some advice! I went out today and bought 'Iron Chelate 7%', made a foliar spray and applied accordingly. I will check back in about 2 days for the results as it says 1-2 days for them to be seen.

Thanks again and fingers crossed!

Mike

No reaction, I definitely think its the oxygen problem. I am going to grab a bigger pump and another airstone and that should be sufficient? Think that would work?

http://www.flickr.com/photos/50802794@N06/sets/72157624124286231/

Okay, I added a larger pump (I had one for a 40 gallon with one 10 inch airstone, changed to a 100 gallon pump and two 12 inch air stones. there were 6 plants in the set up, but I now removed 3 - two were stunted so I tossed em, and one I transplanted to soil and is surviving surprisingly but has a bit of leaf yellowing, but is growing two peppers.

Anyways,

the leaves are trying to gain their greenness back, but they are WILTING. It's sad. I don't know what the problem is. I know that there was not enough water in there for a bit earlier in the week and I finally looked and added some and they reacted great to it. Now its about 3 days later and they're wilting pretty bad. Any suggestions? Should i flush the res tank? ... not sure how I would do that anyways though

The color of the light in your photos is weird and probably not in the range your plants need. Do you have any idea of the color temperature?

Well the light is blue and red spectrum LED. If it wasnt the correct lighting they wouldn't have grown to what they are now, and produced many peppers. The two other plants aren't experiencing the wilting and curling, just one plant. The temp of the lighting isn't what is necessary - its the correct wavelength of light. Heat/colour(ie. 6500K) is just an example of what an object burning at 6500K would look like etc. In terms of wavelength, the red is 630nm and the blue is 460nm.

As for the peppers it was growing at the time, I have cut them off to try to reduce the stress but nothing has worked.

I will post pictures on the flickr.

Here is a link that might be useful: Wilting!! :(

anyone have any ideas about what I can do regarding the wilting? The other two aren't wilting so it really doesn't make sense.