I assume you ballanced the Ph with the water change?

Yes that's fine, you don't need to flush for low Ph.
Zandor Reviewed by Zandor on . PH too low This morning, i notice that at least two plants had a coloration problem. No green in the center of the new bud. I checked PH, it was 4 ans EC 4 also ! I flushed the containers and i put new nutes. Do you think i should have give them just water with good PH? Or is it good now ? Fhydro Rating: 5