I believe he also sent carto tanks. He said he was setting me up for level 2 and level 3. Not sure what that quite means, or even what everything is in the box. It is a very generous gift.
Read and watch some video's on using carto tanks. Look at the ohm's on the cartos and that will give you some guidance and were to set the voltage at. You will still want to play around a bit to find the exact voltage you want but the guidelines will get you in the ball park.
I at first flooded cartos using a tank but quickly learned how to never have that happen again.