what is the ideal ph range for nutes during week 4/5 flowering? i think my plants might have a ph problem i will post pictures once i get my camera. right now my nutes are at 6.4 ph it doesnt seem like much but the problem looks like it has got a bit worse today after i fed them this morning. i am using calmag and biothrive bloom. i just picked up a ph meter today and was using the vial that comes with general hydroponics ph up and down before testing it with the meter. i think it is a ph problem because i tested the water first at 6.5 then put the nutes in it and just found out you arent supposed to do that, so i am thinking that the ph got lowered and that is what caused this. i will post pictures later tonight but i wanted to know what ph level i should be using and when i should start flushing