Quote Originally Posted by Weedhound
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.
Aloha, Math guy

WH Knows of whence he speaks. If he says wait for Stinky, pull up a chair.
You are in good hands here.

Two little t'ings though. :twocents:
Checkin' da PH onna way in is a good idea,
so, while you're checkin' ,check da runoff too.

I'm guessin' you store da water to let Chlorine dissapate?
Dependin' where you live, most water suppliers now use chloramine. Chlorine dissapates, chloramine does not and will kill fish.
Was not sure if the stuff they sell for fish tanks was good for da girls, so, scrounged a 55 gal drum and put him under my downspout.
Now use only rainwater for aeroponics
Catchment rainwater is low PH here, (SO2 from Volcano), but after it runs off a stone roof, it's about 7.4.
I mix nutes, then add a few drops of Lemon juice.
Tried white vinegar but every time I did, even in small amounts.
I got a weird slimy black mold in the res.
Switched to Lemon juice. problem went away.
Could be co-inkydink, or the fact that I was using tap water at the time which is also High PH here.
(I t'ink da water guys overmedicate.)
But, that's Hawaii.
State motto? Half-assed is more than good enough.
Dats OK, state attitude is "Maximum pleasure, minimum effort."
But I digress.
Where was I?
Oh.
Also, lettin' da water sit allows it to go flat.
I figure, if flat water in a tub drowns roots...

I always half fill a container wit fresh mixed nutes and shake da heck outta it just before I geevum to my dirty girls. (Still got 4 in pots).

Best of luck with your grow, brah.

The Zard who is wee