Ideal Temp for water.

my grow has been growin good with regular tap water but what temp should it truly be, real cold? real hot? warm?

Room temp

room temp is what I have read everywhere. This is not hard to accomplish with tap water as it should be left sitting open for 24 hrs for the chlorine to evaporate..

I actually use sun warmed tap water now and the girls seem to love it...

I use tap without even letting it sitout. I do have good tap though. got my work cut out for me