Tip's pointing down ! Grey spots and some leaves are very dark in colour Any advice?

[BUDEZZ]

Look mate, start a threead about your all problems and give very detailed informations on your general conditions, feeding schedule, watering schedule, amounts, pH, EC and whatever you know about your grow. Keep it very detailed. Tell every single details about it. This way we can see the exact problem/s and point it.
Until then you'll get half/missed help somehow and may make things worse.

I dnt know what else to say mate , these plants are just over a week old !! , i am not giveing them any feed at all ! only just started givent them supr thrive,. i water every 3 day's , 3rd water was today !,.