Yellowing leaves

[Jaden4306]

I'm on my first grow and I was hoping for help. Some of my fan leaves are turning yellow and my plants look a little light green. I'm watering every 3-4 days with 3/4 of a gallon each. I'm using Fox Farm Happy frog soil in the top 3/4 of the pot and Fox farm Ocean Forest soil in the bottom 1/4. I'm feeding with Lotus nutrients. I am now on the 24th day of flowering. One plant had a runoff PPM of 1145 and the other 993. I rotate watering with nutrients every other watering and plain water the other. My watering PH level is usually between 6.0-6.2. my temperature stay around 77-79 and humidity between 40-43. I did notice last night temps got down to 68 and humidity down to 38. I'd appreciate any help. I don't want to loose my plants because of beginner mistakes

[Rwise]

Your PH is on the low side for flowers in soil, try 6.5-6.8 they may be in lock out.

[Jaden4306]

Thanks. I'm going to try watering with a PH of 6.8 next watering. I just watered today. Most of the yellowing is on the lower big fan leaves and some that are not receiving much light, but I know there's a problem. Hopefully upping the PH of my water will help

[Bluey]

For a first grow your doing great.
Are the leaves droopy like that all day or just at lights on or nearing lights off?

Upping the pH like that should help a lot but vary it a bit each water 6.5 to 6.8 when you get back into the swing of it.

[Jaden4306]

The leaves don't droop. It was because I didn't get to water them yesterday and when I took the pictures I just watered them. Usually they look perky

[dirtymike]

Might want to cover up those roots I see in pic 1

[Jaden4306]

Ok I will. Thanks. I was saying to myself today that they got so big and they were above the dirt

[Jaden4306]

Should I start cutting off the yellow leaves

[Bluey]

Leave them. The rest of the plant will use the remaining mobile nutrients in those leaves if it needs to.