1st time hydro grower, need help! question!!

Hi im a first time hydro grower and I have a few questions i hope some of you could answer. My babies are about 4 weeks old....1.Do you take the rockwall cubes off the plants after a certain period of time?? If so, when? 2.I'm growing 5 plants in a single tub, will it hurt for the roots to grow together? 3.What is the Ph level supposed to be at? 4.How do i add pics to this message??

Thanks,
PH

1. dont take off the rockwool, transplant it with the plants. you DO NOT want to damage roots.
2. dont let the roots get entangled as you will damage them when its transplant time, otherwise its fine.
3. pH for a hydro setup should be 5-6