I am using shultz as well and have in the past for other grows,I always put a bag of perlite in with every bag of shultz and sometimes I use more!,I must say I havent had any bad luck as such with the soil! seems to have everything a plant needs to survive,it's a good soil for sure and I havent found anything localy that was better!..........................

Right now I am using shultz with a advance nutrient program! sensi A Sensi B plus voodoo juice followed by big bud! I gave their first feeding to them last week thinking I may probably get a little burn considering shultz is known to be full of ferts,but it worked out seemed the soil and the advance nutes never played on one another resulting in burnt or over ferted plants.........