My frist grow d.w.c journal

Up-date 21/08/2011,
Its been aweek since i last up-dated this journal and ive had abit of growth considering i havn't been feeding tidy at all, ive been getting a 1ltr jug and filling it up with water and nutes untill i get 0.4 and then put it into my 39ltr res lol,
I red loads of threads that say how much nutes to use and get this ec-ppms and not one said that the the res needs to be 0.4 and not the 1ltr jug you mix nutes in lol (what an ideot ) Anyways i feed or got my res up to 0.4 which is for small plants and seedings but my plant has hardly any food what so ever and i didnt want to burn my leafs coz theres been like nute burn coming onto the leaves from where the plant hasn't had any food and it go's the same sign's as nute burn. Ive put some pics on here of what its like now, i got some little spots that are rust or looks that way, would that be frist sign's of cal def?