I use bio bizz nutes and have never used epsom salts bro...The all mix has enough nutes to keep her going for 2 weeks then give her 1ml/Litre of root juice on the 3rd week(only) once you get to the 4th week start her on the bio grow 1ml/Litre till you decided to flower. I feed every second watering so if i waterd this morning then nothing tomorrow and the day after that, I would feed that evening...You can use bio heaven aswell which i use its the shit its like red bull for plants great results...When your going to use top loader always feed seperatly to the other nutes works better that way according to Bio Bizz..Leaves the nutes settle then about 10mins later add the top loader i have been trying this on my current grow and must say it does make the difference...Hope that helps ya bro any question give me a shout more than happy to help or check out my journals all the nute changes I use are up on them...