Older leaf has yellow dots and burnt/yellow tips

The problem is your using straight water and thus lacking Manganese. You need to use Cal-Mag Plus with your watering's. Use 3ml per gal Veg and 5ml per gal when flowering. As for nutrients always use %75 strength and make sure the PH of the solution is 6.2. I will go further and say every third watering use straight RO. Lastly your humidity is way to high, it needs to always be around %40. I set my controllers to %40. Do not go below %35. And for temps do not go over 84F

Can't really see anything to worry about, no plant will ever have 100% perfect leaves, 100% of the time. Remember too, baby plants need baby feeding...........quarter to half strength at most at this age.

Just watering her about ~500-750ml. Wait 2-3 days depend on climate. My soil still have some moisture before watering. Use chopstick or put your finger down about 2inches if there no soil stick with your finger it times. I put only 10%nutes of the lebel said and not use 100% at all stage if it autoflower (they use less). Actually in soil i put only micro nutes at veg. I still fight with hot. Humidifier help a lot. It down from 32°c to 30°c whem it turn on. Put more fan if RH go beyond 70. Im still a newbie but i find this improvement while learning here. Hope this help.

I don't feed where there is a run off as I am in a 5 gl pot and I am scared of using that much of a water

@gmsgrows. 19 days old today. I live in jamaica , so I only have access to the pro mix veg the one with the tomato on the bag. I do water every morning as the soil drys out each day after watering, but I only use a syringe and give 10ml each or 20ml depending on the dryness of the soil

@PENDRAGON79. I KIND OF THINK SO TOO BASED ON OTHER PICS I SAW, NOT SURE. BUT I STOPPED THE NUTES FOR NOW JUST PLAIN WATER UNTIL OLDER. IM USING PROMIX I ONLY HAVE ACCESS TO THE PFOMIX VEG AND IT STATED THHE SOIL FEED UP TO 3MONTHS SO IM NOT SURE IF THATS WHY AS WELL.

@roberts. It's really hard to take a good picture under them lights. Always have some line in it when close to the led lights. I bought some need oil. Should it be applied to just root or leaves as well? I do see ants

This is hard to say. There is not much information to go off of. Plus pictures are not good for a diagnosis. It could be calcium deficiency, or it could be critters. It's hard to say by pictures.

How old are the girls? What substrate are you using. Soil or coco?. If your in soil and you fed twice in a week, that would be to much. Water, dry, water, dry, feed, dry, water, dry, water, dry, feed, dry, etc. Coco, feed every watering but monitor your runoff ph and ec. and keep withing proper ph and ec levels