Hi i just started my first grow and i chose nirvana blue mystic and white rhino. I am using a 250w mh and foxfarms ocean organic. the seedlings popped out on aug 16 and started out great but after several days they turned from a nice dark green to very yellow. i havent introduced any nutrients yet and water about every 3-5 with normal water from the sink. the seedlings have shown no new growth in the last 4-5 days and have very skinny stems. the plants are 8 days old now but have their 1st sets of leaves but the 2nd sets are very skinny and yellow and arent growing. i think i may have a ph problem but im not sure how to fix it. the plants are about 2 to 2 1/2 feet from light. any help is greatly appreciated thanks!