pcduck
Feed the soil, not the plant
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fruity86 said:if i get this right biggerbuds is saying empty the rez FIRST then fill/flush will PH'd water correct ? if he did this then they would be no nute in the rez for the plant to take up
duck are you saying keep the nutes in the rez and just change the PH so nute's can't be taken up by the plant
how i do it is empty the rez and fill up with PH'd water B/C i drained the rez only a small trace is left, a couple days later i change the water again
fruity I do not know what system you are running but What flushing does is wash away the build up of excess nutes and salts in your grow medium(rockwool,hydroton, ect.) and root zone. If you pH your water you are trying to feed these excess nutes and salts to your plants. If you use un-pHed water the plants are not feeding on these excess nutes and salts. They are being washed away.
If I were to flush my DWC I would empty my buckets and fill with un-pH water and then turn the airstones on. After what I would think would enough time to wash away these excess salts away. I would then see what my options were as to what to do next(This is dependent on the reason why you flushed and what shape the plant was in)
If I flush my rockwool cubed plants I place a bucket of un-pHed water and dunk the cube numerous times till I think the excess build up of salts have been washed away.I would then see what my options were as to what to do next(This is dependent on the reason why you flushed and what shape the plant was in)
If plants are in a tray I imagine, If a grower would run several cycles of un-pHed water through their system this would also wash away the excess nutes.
When I say un-pHed water this is water with NO nutes added to it.