1st grow..need some help

So here are some updated pics. Can anyone suggest cal_mag and where i can find it? Also im thinkin of tryin an auto strain next grow. Any suggestions on strain/breeder?

any hydro store should have cal-mag. if not use google shopping.

Thanks bailey...ill have to go with google.

Here is an update as of this morning. Im excited to see hairs. Ive never made it this fast before. Im thinking I have another 30 days of flowering. Its been 4 weeks since the change to 12/12