^^Loc's on key.

You can go by the schedule for your nutrients if you wan for ppm if you dont want one. A TDS/PPM meter is needed in a serious hydro grow.

But even if your dicking around w/ hydro you have to have some way of checking ph or you are fucked...as said above.
The White Snoop Reviewed by The White Snoop on . ph and tds meters absolutely necessary? i understand that a lot of you go all out with your grows and i know that it's worth it, but how bad could it really be if i was lazy about it and didnt use a tds meter or any ph meter or adjuster? is it even something to be considered? Rating: 5