Yes, you're right it's a bit of a problem, but is this the same water you have been using all along? Perhaps sittiing out lowers your ph (although it really shouldn't have too much effect on ph itself) or the soil you've been using has good ph buffers in it. Or....or ...or.....

You really need Stinky here.......you're getting out of my knowledge range in soil in a hurry. I would go ahead and check runoff ph......see if your soil is buffering things at all or not.....and Stinky should be back in the morning to help you. I'd hate to give advice I'm not sure of because I think you recently DID transplant to fresh soil didn't you? i really don't want to make things worse here.
Weedhound Reviewed by Weedhound on . First time, having problems Here is my situation: Closet setup, am using a HID florescent ballast for the growth phase then will switch to a HPS bulb for flowering. I have been running the florescent setup 24/7 for a little more than a month now. Plants are beginning to reach a foot tall. Started the seeds directly in standard "kegger" red cups which i cut holes in the bottom for drainage. I will be transplanting to a 6" pot once the plants start to show gender. (will also switch to HPS 12/12 at this point) Rating: 5