what you use for soil?

[peter]

Hello Ron, This is the most excellent site i seen. I need your advice of what you use for soil? i happen to see people mention about grorocks and lavarocks? i am new at this hydroponics and need to know what soil you guys use for hydroponics. i am guess it is not regular soil? Thanks a bunch. [email protected]

[Ron]

Soil! What is soil? That must be the crap I wash off when I buy bedding plants from the store.