Is this normal growth for 2 weeks from clone. They are under 2' x 4 lamps T5 florescent 18hr when I changed the nutes (every week) I forgot to check the PH of the change over rez and the PH was @ 4.6 for half the day, strange thing I swear the plants grew 1 1/2" in that half day:hump:. I try to...