GH makes an airpump that they advertise as the only one on the market made for Hydro. has 4 adjustable outlets that can run 3 stones per outlet for a total of 12. Pump is suppose to be extremely quiet and runs around $70. as for nutes read Latewood's Legacy which is a sticky in Hydro section. According to the Hydro shop I go to the regular GH 3-part is best for Hydro and the flora nova series is best for soil, atleast that is what I was told :thumbsup: