hey, i got a couple babies about less then a month old and the bottom leaves are fading to yellow and looking weak. i use scotts potting soil, am doing a combo of 6 hrs sun and cfl..w/ no nutes of my own( except the soil says continuous feeding for up to 4 months)...havent checked ph(oh and does anyone know of a cheaper way of checking ph w/o spending $20, super broke)...thanks