The friendliest place on the web for anyone with an interest in aquariums or fish keeping!
If you have answers, please help by responding to the unanswered posts.
Everybody feels that way at first, don't sweat it. Once you visualize the system and actually put the pieces together you will see that it is very simple. Do you have any specific questions?
IMO, garbage and a waste of money. They are a gimmick to coerce folks to hand over more money. You would be much better off dosing Glut (SeaChem Excel, API CO2 Booster, etc).