giannoulis
Member
Hi everyone,
after 10 years growing in soil, i went for a diy DWC system.
Seedlings went into the netpots in rockwool, 2 days ago.
I use tapwater.
EC of the solution was .71 on day 1, .67 on day 2 and .66 today.
I was expecting the pH to fluctuate a bit and that’s why I have been measuring it daily, but the results are shocking. It went from 5.8 to 7.5 in 24h. Used pH-down to about 5.5 and today it was at 7.5 again. Used pH down to 5.4 and within one hour it has gone to 6.5 again.
Temps are dialed in, I even use an AC to vent cool air to my reservoir.
What am I doing wrong?
I ve read that in some cases the rockwool cubes tend to raise the pH, could that be the case?
Any tips are greatly appreciated.
This is my setup:
![CBA9662C-4A6B-42A3-9828-EA95C4AF76A6.jpeg](/data/attachments/4302/4302861-4d747b1bf2a0bb03bee5c958f5622620.jpg)
![E2AA8FF5-D51C-407C-82A9-6556E4C360E6.jpeg](/data/attachments/4302/4302862-bd4e8cbf50b7fdbc283495e7a7390284.jpg)
![160D24BF-7415-4696-95FB-DF56034960FA.jpeg](/data/attachments/4302/4302863-2c3c54ffb85921bcca91742e627f6c9f.jpg)
after 10 years growing in soil, i went for a diy DWC system.
Seedlings went into the netpots in rockwool, 2 days ago.
I use tapwater.
EC of the solution was .71 on day 1, .67 on day 2 and .66 today.
I was expecting the pH to fluctuate a bit and that’s why I have been measuring it daily, but the results are shocking. It went from 5.8 to 7.5 in 24h. Used pH-down to about 5.5 and today it was at 7.5 again. Used pH down to 5.4 and within one hour it has gone to 6.5 again.
Temps are dialed in, I even use an AC to vent cool air to my reservoir.
What am I doing wrong?
I ve read that in some cases the rockwool cubes tend to raise the pH, could that be the case?
Any tips are greatly appreciated.
This is my setup:
![CBA9662C-4A6B-42A3-9828-EA95C4AF76A6.jpeg](/data/attachments/4302/4302861-4d747b1bf2a0bb03bee5c958f5622620.jpg)
![E2AA8FF5-D51C-407C-82A9-6556E4C360E6.jpeg](/data/attachments/4302/4302862-bd4e8cbf50b7fdbc283495e7a7390284.jpg)
![160D24BF-7415-4696-95FB-DF56034960FA.jpeg](/data/attachments/4302/4302863-2c3c54ffb85921bcca91742e627f6c9f.jpg)