05-03-2008, 05:06 PM
|
|
((targ-cur)/targ)x8xcap
Join Date: Sep 2006
Location: a dry and arid place
Posts: 2,664
|
250 ppm is well below the safe limit for potable water
our tap water is 250 and it aint horrible, but it is a bit hard (lots of calcium)
I believe plants grow faster in hydro because it's less effort for the to biold a bigger root system
|
|
|
|