I think Paul was referring to Dyna-Grow Pro-TeKt. You can buy it online. I have not used it. The following link is an example:
Dyna-Gro Pro-TeKt (0-0-3) (Fertilizer & Nutrients)
I'm a novice, so there are many more experienced people here to advise you, but I'd wait until the pencil came out almost dry before watering again. If it's really wet, you can take it out of the pot to help it dry off more quickly. You can then check the roots to see how they are doing.
Good luck! Keep asking questions.