...I'd aim for a ph of 6.8ish.

Are you mixing your own potting mix? If so, you'll have to either add something (lime) for ph buffering, or keep a very close eye on your runoff ph. (peat has a very low ph)

Commercial peat-based potting mixes are usually pre-buffered, and are the easiest to use. Commercial compost mixes can vary widely in ph, but are generally in the 6.0 range, which is way too low for cannabis indoors in pots, and needs shitloads of lime and perlite added.

If mixing your own, there should be a recipe or two available. Use the site's search function, likely you'll stumble across 'em.

Next time though, try starting your own thread, and quit shouting at us. :thumbsup:
Rusty Trichome Reviewed by Rusty Trichome on . New Leaves Yellowing First timer here Just noticed one of my four 12 day old plants is yellowing from the top center- 3 rd set of new leaves are yellowish and the older 2nd set of leaves just below it are yellowing from the stem and radiatiing out. The others look fine right now. (see pictures of sickie and 3 healthy sisters) Set up 2 100W CFL with Y adaptor in Brooder reflector one per plant about 2-3" from top of plants 4) Is there a consistent fresh air supply? yes 5) Do you have an exhaust fan and a Rating: 5