2nd grow, 3 ladies

Spent this week trying to figure out what's wrong with these plants. The surprise seems to have suffered from over watering. All 3 look like they have potassium deficiency along w calmag issues on random leaves. The widow and surprise seem to also have phosphorous deficiency. I've got feedback from my grow questions that I've got nute burn but I don't think I do. I think my burned tips are from the potassium deficiency. I've been watering the 2 smaller plants every other day, nutes one watering 3/4 tsp of bloom dyna grow 3-12-6 then plain ph'd water the next watering. With those measurements my ppm is around 380 going in, but the dark foliage has me scared to add more nutes. I'm pretty confused this grow and already looking forward to my next one so I can get a restart lol. I've learned a lot this 2nd time around. NEXT GROW: Gorilla Zkittlez Auto & OG Kush Auto