24 hour sit water or fresh water..run off ph/

use either fresh water or sit 24 hours on plant 1 or the other not alternating! because they will produce 2 diff. ph runoffs.my waters ph the same either way 7.4/even if u were to lower the same 2 waters to the same ph ,there runoffs ph would be diff. been there! my water ph is the same wether i let it sit or not ,bout both produce 2 diff. ph run offs,i hav to stick threw the whole grow .

 

bottom line is ph runoff.mix thoses two water and it no go.