Could use quick advice

I have a few plants that where doing great a day or two ago until I started to notice bottom leaf starting to yellow so I ph’d my water and it is between 6.5-7. As I walked back into my grow room I noticed a small black fly that I think is a fungus gnat and am wondering if this could be my problem? This is my first time growing so any advice is greatly appreciated.

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Looks like they are ready for a light feeding, and not yet but eventually could be, they come around in an environment thats to moist

@Firsttimer

what is the soil you are using?
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Strain; Type, Bag Seed, Or Na fem white widow and bag royal kush

Soil In Pots, Hydroponic, Or Coco? Soil in pots

System Type? Na

Ph Of Runoff Or Solution In Reservoir? Na

What Is Strength Of Nutrient Mix? Ec, Or Tds
I will be using 1-1-1 for nutrients
Indoor Or Outdoor- outdoor

Light System, Size? 4×32 watt florescent 4ft strip lights 6500k about 3.5 inches from plants

Temps; Day, Night day time 25-28°c night time 21-25°c

Humidity; Day, Night day time 58-62% night time 52%

Ventilation System; Yes, No, Size no. Controlled by opening door if needed

Ac, Humidifier, De-humidifier, humidifier

Co2; Yes, No no

The soil I’m using is just black soil

What’s the npk ratio in that soil? @Firsttimer
Also ph may be a problem

It doesn’t appear to have one. It just says Sulphur 0.05 calcium 0.06

She may have a ph problem, or need a light feeding. If you dont have a ph meter if possible you may want to look into getting one as most problems are ph related.

However I think the 1-1-1 would be good for her next time you water give her a little

Awesome sounds good, thanks for the advice!

My pleasure, if you have any more questions garrigan62 or i will be happy to help