looking into starting a system

[sean]

Ok so this week I'm going to order the last few things i need to set up.
I'm going to get some 3 inch pots and Hydroton. heres the test kit i am thinking about getting
General Hydroponics pH Test Kit
do i need any other testers or is PH all i need to worry about
also i was thinking about getting this starter kit but not sure what all comes in it and what they all do
Go Box Starter Kit