What kind of UVB lamp did you use? I don't think you mentioned that.
NEVER EVER WATER WHEN THE SOIL IS WET. Especially with nutes man that's gonna just sit there...Over watering will cause you to get multiple lockouts for no reason and you will end up chasing your tail the entire grow trying to figure out the chaotic myriad of atrocities inflicting your plants. In 3 gal containers with plants of that size you should only have to water every 3-4 days. Your roots have to breath for day do the lift test. I use 2 1/2-3 cups every watering last me 3-4 days easy.
Your girls look like they need some cal mag (tsp per gallon whole flowering time in FFOF). I see you are using all fox farm but no cal mag which you must use with fox farm nutes and especially when using the soil.
Looks like a mag deficiency on that leaf and in my opinion you are giving them WAY too much beastie bloomz that shit is STRONG!!!!!!!!!!!!!!!!!!!!!!!! You are using tiger bloom with it don't go over 1/4 tsp and use sparingly...
Reason: You don't want to give those girls that much Phos because the buds will turn spindly and ratty not to mention trimming will be a nightmare. Less yield when you are trying to get more is a bummer.
If an expert is lurking correct me if I am wrong, but I believe I am dead on with this and if it were my plants I'd make these changes. You should ask in infirmary just to double check, but I started out with exactly what your using and have since corrected my problems.
You are doing a fantastic job for your first time. I used all the nutes and soil mix you used when I first started so I will hang around and try to help you GL and I got some WR's at day 44 now should be fun seeing what we get.