You're gonna need a lot more than 40 bucks my friend.
At the bare min. you will need a ph pen, some ph down
nutrients and more light

But, so far the bar is most likely an air stone. Attatch it to the air pump and put it in your reservoir....leave this on 24/7. At first have the water level just at the bottom of the pots of hydroton, so the bubbles splash the bottom and you get air and water to the rootzone.

Get a timer and run the light on 18/6 or 24 if you cant get one for now.
-Good luck