thanks budslinger,,i made a new res its ph is 6.5 so with the usual 5 point swing it should settle at around 6.0 please god,,also added some calmax it has cal mag and iron in it,,so if the ph ends up where i want it there will be plenty of nutes there to stop it happening anymore also added some canna pk 13/14 as im in the 5th week of flower so there should be some fattening up occuring soon judging by the plants in soil it onlt takes a few days to happen do i only add pk 13/14 once ?? the lable says add it to the res for 3 days any ideas
I have found that my ph would swing more when I had less aeration via whatever bubble bar or disk i was using. You might add some bubbles and see if that helps. I have 50 gallon pumps for each of my 5 gallon buckets and once maybe twice in 5 days do i add ph down.