im using an eight pot wilma and I am having problems about the PH rising.
Im in a hard water area and am using canna nutes in clay pebbles.
I add 45 liters of ph blanced water (5.5) then add my nutes mix it re adjust to 5.5 and then run my pump for 15 minutes to really mix the solution.
It will then come back out at base ph 7.05 same as my tap water so I re adjust to 5.5 and then two days later I come back to 7.3 how is this possible and please help me solve it ?

Sounds like the buffer in your nutes are not strong enough, you need hard water nutrients

In hydro always best to bubble or move your water for at least 12 hrs to give you the correct ph, then you add nutrient, and finally adjust ph

Also turn of air pump half hour before testing the ph

Owd

Hi bab

I personally would not ph my water until ive mixed all my nutes in 1st.

Take care

HH

my pebbles were throwing my ph out for a while , even though i soaked them first in ph adjusted water.