Very cool. Way to grow! It is a great hobby, and I'm having fun with my first grow too!
I'm without the fancy testers and gizmo's myself and I learned everything I know reading this site (THANKS EVERYONE!) I didn't have a clue, I basically put seeds i sprouted in paper towels in dirt and when they popped out I was like OH shit I better find out how to grow these little buggers. Maybe I've been lucky, I have no clue what my Ph is lol I do add apple cidar vinegar to my water. Anyway, now I've got buds growing in my closet ! Hehehehe Awesome!
Next grow I'm going to start tying by bitches down and having some real fun with them. Yee haw!
Good Luck!!