Need help..! Plant leaves yellowing? Branch stems redish color?

Hello, This is one of my first successful grows and before i get into my problem(s) i will begin with my setup. This is a CFL/Closet grow. 60W CFLs Cool white, 5000k. Lights are at right distance (3-4 inches from top of plant) Humidity around 45-50 and temp around 75-82. Plant gets wind from a fan. My grow medium is soil, 100% Fox Farm Happy Frog, Plant is White Widow(60% Indica, 40% Sativa). Now to begin with my problem(s) ; Everything at first was great, plant sprouted within 2-3 days, i was using just plain sink water for the first week ( I think Ph was neutral at 7) but then some of my plants leaves started to turn yellowish/paleish on the outer side of the leaves.. i figured it was because i wasn't Ph'ing my water supply, then i got a Ph kit and have started leveling to 6.5 range and plants leaves are starting to look better (BTW the plant is 2 weeks as of today) but you can still see the fading yellow. Does the discolor stay there and the new leave sets will begin to come out green and healthy? I have been watering on time ( no overwatering ) whenever soil was dry within an inch or so deeper. Does FFHF have common issues with yellowing of leaves when being used straight up? ALSO, plant branches are a little redish in color, im sure its normal but just a noob here looking for expert answers. Let me know what you guys think is up, give me your FFHF experiences, what it did to leaves, problems, etc. Thanks! SMOKE UP !

i dont know much about ff soil but the reddish stems can just be genetics some of mine have that

The reddish stems are likely genetics, should be nothing to worry about. The pic is off colour but doesn't look terrible, it's normal to have lighter green areas where new growth is coming in. As long as it doesn't turn and stay truly yellow you're fine. When you plant into hot soil (FFHF is hot) what works for me is layering the soil mix. That is mixing it with something like PRO-Mix/peat to "thin" the hot soil a bit. I do this for clones/seeds in party cups, put about 1/2 of whatever soil/medium I'll be using in the bottom 1/2. The top 1/2 is straight-up PRO-Mix with essentially no hot nutes in it. That way the first week or so while they're developing a root structure they won't get burnt by the soil being too hot, after a week their roots go past that point and are a little more established when they hit the hotter soil and ease into the nutes. Same applies if you're planting straight into whatever container you'll grow them out in.

I see a happy little plant, might want some more light but it looks good. Btw those red stems mean nothing.

I always advise diluting that hot soils FF or MG with 30-50% perlite, it avoids compaction of the roots and dilutes any 'hot' nutes with the soil, that you may amend later with a more suitable nute, I do agree red stems is partly strain specific, but then again non of my WW, have ever went red or purple on the stem, look to keeping an eye on your night time temps, reds stems is also anthocyanin or food coloring to you, to the geeks its accumulated (P) phosphorous, the plant has choices to make, cause you can't keep her warm enough, she takes (N) and (K) but dumps the (P), so the (P) biulds up in the stem, keep a temp gauge in there,
maintain 70f/25c.
Right now its time for a flush: https://www.rollitup.org/Journal/Entry/flush-baby-flush.27513/