Leaves dying getting yellow

[Pp33]

Hi Everyone!
Please look at my girls. What do you think? All of my plants getting yellow from the buttom but its coming up.
No overwatering for sure. Can be the water ph too high?
Thanks for your answers in advance.
Peace
Pp

[Beeman]

Could be pH or may need more nutrients ?More information about your grow setup, light,growing medium, nutrients used etc.. also check out the problem and symptoms tabs lots of good help there.

[Pp33]

Thanks for your answer!
I guess its gonna be ph. I use two filter because the tap water is so hard but seems to be my filter was full. I did make a nice flush with good water.
Hopefully works.
Peace