Quote Originally Posted by condotoo
yesterday I changed water and had the ph at 5.5today when i checked seedling the leaves were drooping again i checked the ph and it had went back up to near 7

What could be causing the ph to rise Like that?
Hydrotron is the culprit here.
It must be pretreated by rinsing and then soaking in a low PH water bath.

That said, even after soaking in PH 5.4 water for a week it still caused my PH to climb.:wtf:

So, I don't use it anymore. got a 50# sack in the shed.
Free to a good home.

Keep in mind that the PH scale is NOT linear.
PH6 is 10 times more acid than PH7.
PH5, 100 times.

An abrupt change of PH, (like changing out the res water), can kill, even weed, from the shock.
A gradual change is less stressful but will lock out nutrients if it stays too high or too low for too long.

In answer to your next question, yes you can.
I have used rockwool in a drip system and found that is does get soggy/saturated easily.
If the water is properly aerated, it can works as well as DWC.
If not?
Well, I don't use rockwool anymore, nuff said.


Suggest you look into coco coir.:thumbsup:
It is very forgiving, inexpensive, grows big, like "solidstate hydroponics", and is quite difficult to overwater.

Because I have a very black thumb, I need all the he'p I can get just to keep from killin' my girls.
I went from soil, to H'tron, to Rockwool, to hydro, to coco.
With coco, even a putzer like me can grow magnificent meds.
[attachment=o246624]
Check out the pictures in my albums and you will see the progression.
I went from nice try, to woohoo, in about 1 year.
How?
Read 'till ya puke. Then read some more.
Then ask questions.

I see big buds in your future.:jointsmile:

Aloha,
Weezard