help my plant/ baby teeth

Hello,
I am a new grower. And just haveing a hard time identifying my problem with my mother plant. My bottom leaves are yellowing from the bottom up. Not at an alarming rate or anything but I am a little concerned. Also my leaves are curling under as you see in the pic, not the sun leaves, but the leaves on the side branches like where you would clone. This is what I have: an advantage 400w system balice built in. A 3x4 foot closet. The light is about 15-18 inches from the plant. Temp 80 degrees tops but ave 77 degrees, night time as low as 60 degrees.The PH balance for my water is between 6.5 and 6.3. For soil I am using a half fox farms and half happy frog. I attached the photo of the soil. For nutrients I am useing, bigfoot nutrient solution,grandma enggys F-1 solution, and liquid karma that I have posted the picture of the solutions. I have been reading around and I have not checked the PH in the soil so that mabye it. But I did read today that if your growing with soil you want your PH to be between 5.6 and 5.8. Any advice would be good I appreciate anyones time.

either too hot or overfertilized.. I would say a mix of both... Some plants hate high temps and alot of nutes. I would get a fan in there to give it some airflow as well as a thermometer/hygrometer with a sensor to monitor the max/min temps. I would give it just pure clean water and water it about 1/4 gallon(or less depending on potsize) 3 times a day for about 3 days then start back about 1/2 strenght of your nutrients.

Thanks for your reply I will try and keep you posted.

Thanks
SALT