I run my hydro 5.4-5.9 and my soil at 6.5-7.0...No higher than 7.0...that is the high side...above 7.0 and the ph level won't allow uptake of key nutes n-p-k...but also as LOCNAR stated...if they look good, leave them alone...It is good that you ask and don't take info for granted. I sometimes raise/lower ph in order to have plant uptake a particular nutrient; as slight changes in ph create optimum conditions for each nutrient...latewood
latewood Reviewed by latewood on . aeroponic ph question i use an aeroflo36 that can be seen here... http://gallery.cannabis.com/index.php?cat=45139 what should the ph of the resevoir be in an aeroponic system. it seems to me that since the roots arent encased in rockwool but rather are suspended and misted that 5.8 is a bit low. i currently keep it at 6.0 since im unsure. any help would be sweet....thx friends Rating: 5