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Joined: Tue Feb 26, 2013 6:34 am

ph level dropping - What can be causing it to drop?

Hello, My PH level is dropping from 6.0 to 5.2 in twelve hours. I'm running a 150 gallon res feeding 360 heads of lettuce in the flood table. The monitoring system is mixing nutrients ok/holding temp ok/ but will only lower ph if above 6.2 and not raise it if it's to low. I do have a small algae build up in the res.Could this be a factor?

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Joined: Sun Aug 25, 2013 1:42 pm

Are you growing in rockwool? If so: https://forums.bghydro.com/archive/index.php/t-42.html

Posts: 13030
Joined: Tue Jan 01, 2013 8:32 am
Location: Hawaii, zone 12a 587 ft elev.

How often do you change the solution? Bacterial build up and accumulated salts can also affect pH.