You can mist them with water and put a clear dome over it if you want but you don't have too. Keep them misted and keep your water level up to the bottom of the net pots for now till you see roots. They look good. Any kind of PH test is better than none. Yours look alot like my drip I just have a manifoil of 3/4 down the middle with six 1/4 lines to the pots and a pump in the water. Keep us up on how they root.