Hey guys, this is my second try at growing cannabis. The first try was not a success. I had planted 4 plant from seeds and they all turned to be male. This time I've germinated 3 seeds and hoping to get at least 1 female! I germinated one of them on January 23 and 2 other 1 week later. I started with 125 watts cfl and switched to 600 watts hps 5 days ago on the 17. I am using Pro Mix BX mixed with about 10% perlite and will be using Dyna-gro Foliage-pro for veg and bloom for flower. Here is how they look now on febuary 21. The leaves on the biggest one have some small light yellow spot and the tips are burning a little. Is it a sign of to much nutrients? I gave her half strength of Foliage-pro twice. Tonight I gave her straight tap water. The small plant is a dark green and the leaf are all curly. I don't know what's wrong with her. I will be buying a ph tester for the water and a hygrometer real soon. Thanks for passing by.