Welcome to the Growery Message Board! You are experiencing a small sample of what the site has to offer. Please login or register to post messages and view our exclusive members-only content. You'll gain access to additional forums, file attachments, board customizations, encrypted private messages, and much more!
It really depends on what model your looking at in the hydro store, we can't really tell you if it's the same thing without knowing what pump you were looking at. I can't vouch for that brand, haven't seen it or used it before.
No you do not need back pressure.
-------------------- Dude she isn't as young as she use to be.