I am a newbie 13 days into hydrophonic grownth.
PH 5.75
Nutrients 9 EC using calibrated Nutrient meter with auto temp compensation.
Temp 80 degees.
Lights 600 watt incandecent equivalent Florescent grow bulbs in reflectors 3 inces above plants, on 24/7.
One plant got root damage due to my being clumbsy.
4 small fans running 24/7.
Small closet door open 24/7.

I am loosing bottom leaves but on healthy plant new growth at node of each fallen leaf. I have left leaves
on until they either fall off or new growth is looking viable.

Is it normal for bottom leaves to fall off?

I also have pictures but do not know how to post them here. Any help with posting picture would be helpful aldo.

Thank You,
Cheryl