I got issues, Playboy issues..

sup, i have 5 plants about 2 weeks in now and i noticed that in the middle of the leaves that all of them are getting light yellow patches. i been feeding them full dose of flora grow 3 times a day. I think its because of nutrient burn but let me know what yah think. Also theres this white stuff "growing" or i think it is, on my rock wool all of them have trace amounts, whatayathink it is.

YungMune!!!

I'm a novice, but I think it could be algae or sum kind of fungus maybe...
you should try to cover the rockwool cubes with something "light stopping" like aluminium foil.

my cubes were all getting green on the tops with algae, after about a week of light exposure, I coverd them with 10x10cm aluminium foil, with a hole in the middle, and after couple of days, the green algae thingy was gone, dead, and cubes back to normal color.

my two cents

Cut the nutes back as those are too young for full strength go to half dose for 7-10 days then start a full cycle. The rockwoll is to be under the hydroton thats why your getting mold and mildew growing.Add some grotek h20 to your res it will clean and kill the algae, mold and mildew and also gives roots a o2 boost for faster, sturdier plants