More pics of three plants left

[latewood]

Here are the three plants I have left in my aero system day 18 from seed...still 18/6 two of the pics are real dark guess I need more light...Plants are looking real good now that I lowred the nute strenghth to 500 PPM NPK 800 total PPM after adding calmag plus... using 3 mil per gallon micro and 3 mil per gallon bloom...15 mil of calmag in 15 gallon res...backed off the calmag amount to only 1/4 teaspoon per gallon...seems to be alot better... more week of veg ..then starting bloom...I should flush with something before bloom stage...forget what to use and how to flush please anyone give me pointers????? How do plants look???

you don't have to flush, but if you do use your ph adjusted RO water 3 days to a week
then hit with the bloom nutes...imho.later